Feeling a bit uneasy about your home security? In today’s fast-paced world, peace of mind is priceless, especially when it comes to keeping your loved ones and valuables safe. Traditional locks offer basic protection, but what if you could blend that tried-and-true security with cutting-edge smart technology? That’s exactly what a double cylinder smart lock brings to the table. These innovative locks offer the robust security of being keyed on both sides, meaning you need a physical key to lock or unlock from either the inside or outside, combined with the convenience and advanced features of a smart lock.
Whether you’re looking to upgrade your front door, secure a garden gate, or add an extra layer of protection to your commercial property, a double cylinder smart lock is a fantastic solution. They’re designed for enhanced security, making it tougher for intruders to bypass, and often come packed with features like keyless entry, remote access, and integration with your smart home system. But with so many options out there, how do you pick the right one?
We’ve done the legwork for you! We’ve rounded up 10 top-rated double cylinder smart lock options that offer a blend of security, convenience, and smart features. Let’s dive in and find the perfect fit for your security needs.
1. Double Sided Keypad Door Knob with Dual Cylinders and Key (Product 1)
This keypad door knob is a game-changer for anyone needing secure, dual-sided access. What really makes it shine is its two-way security, featuring keypads and cylinders on both sides. This means full control whether you’re entering or exiting, making it incredibly versatile for everything from garden gates to commercial spaces that demand robust bi-directional access management. Plus, its smart password synchronization saves you a ton of hassle!
- Two-way security with keypads and cylinders on both sides
- 50 access codes per keypad with backlit functionality
- Flexible settings for auto or manual locking (2s to 12hr delay)
- Password synchronization between both sides
- Anti-peeping user code protection and low battery alert
- Durable zinc alloy construction with IPX6 waterproof rating
- Wide temperature resistance (-22°F to +176°F)
- Versatile use for doors 1-3/8″ to 2-3/4″ thick
Pros:
– Excellent for situations requiring two-way controlled access
– Highly customizable lock settings
– Synchronized codes simplify management
– Built tough for all-weather conditions
– Good emergency power option via Type-C USB
Cons:
– May be an overkill for simple single-entry residential doors
– Limited advanced smart features like Wi-Fi or app control
User Impressions: Users frequently praise this lock for its robust build and the convenience of having keypads on both sides, which is perfect for securing areas like backyard gates or shared community entrances. The ability to customize auto-lock settings is also a big plus for daily use.
2. BOTHSTAR Double Sided Keyless Door Knob Lock with Fingerprint (Product 2)
Elevate your security with the BOTHSTAR Double Sided Keyless Door Knob, which stands out with its incredible 4-in-1 unlocking options, including rapid fingerprint recognition! This lock isn’t just about dual-sided security; it’s about making access smarter, faster, and more flexible. Imagine unlocking your door in just 0.25 seconds with a simple touch, or granting temporary access remotely, all without needing Wi-Fi for dynamic codes.
- 4-IN-1 unlock methods: Fingerprint (100 capacity), 50 user codes, backup keys, remote sharing codes
- Voice Navigation for easier setup and operation
- Ultra-fast 0.25s fingerprint recognition
- Independent configuration for each side (unlocked, auto/manual lock)
- Auto-lock time delay (2s to 12hr)
- Remote code generation for temporary access (no Wi-Fi needed)
- Anti-prying technology and silent mode option
- IPX6 waterproof rating, suitable for extreme temperatures
- Durable zinc alloy construction, fits doors 1-1/4″ to 3-7/8″ thick
Pros:
– Comprehensive access methods, especially fingerprint
– Quick and intuitive operation with voice navigation
– Remote code sharing without internet dependency
– Highly durable and weather-resistant design
– Flexible auto-lock settings for varied needs
Cons:
– Requires careful initial setup for multiple features
– No direct smartphone app control or smart home integration
User Impressions: Customers love the convenience of the fingerprint scanner and the secure remote code generation. Many find it ideal for rentals, offices, or multi-user environments where robust security and varied access options are crucial. Its all-weather performance is also frequently highlighted.
3. Kwikset 665-S Double Cylinder Deadbolt with SmartKey (Product 3)
The Kwikset 665-S Double Cylinder Deadbolt brings Kwikset’s renowned security and convenience to your double-keyed entry. This deadbolt is a solid choice if you’re looking for a traditional, yet highly secure, lock that requires a key on both sides for operation. Its standout feature, SmartKey Security, offers a unique blend of protection against advanced break-in techniques while also allowing you to re-key your lock yourself in seconds, giving you unparalleled control over your home’s access.
- Double cylinder operation: Keyed on both interior and exterior
- Features Kwikset’s SmartKey Security technology
- Protects against common break-in methods
- User re-keyable in seconds
- Designed for enhanced security on exterior doors
Pros:
– Enhanced security with key required on both sides
– SmartKey technology for easy re-keying and added security
– Reputable brand known for reliability
– Ideal for doors where key-only access is preferred
Cons:
– Lacks modern smart features like keypads or remote access
– Requires a key for exit, which might be a safety concern in emergencies (check local codes)
User Impressions: Users appreciate the added security a double cylinder provides, especially for glass-paneled doors where reaching in to unlock is a concern. The SmartKey feature is a major hit, allowing homeowners to easily match their new lock to existing keys.
4. Double Sided Keypad Door Knob with Dual Cylinders and Key (Product 4)
This keyless entry door knob is designed for robust two-way security, mirroring the impressive features of its counterpart (Product 1). It stands out for its comprehensive control over access, ensuring that both entry and exit points are secured by keypads and identical keys. Its flexible settings and password synchronization make it a highly adaptable solution for diverse environments, from residential gates to bustling commercial offices.
- Keypads and cylinders on both sides for two-way security
- Up to 50 access codes per keypad, backlit for night use
- Flexible settings: Automatic or manual locking, bi-directional or uni-directional control
- Auto-lock delay configurable from 2 seconds to 12 hours
- Password synchronization for effortless code updates
- Anti-peeping code protection, low battery alert, and emergency USB-C charging
- High-quality zinc alloy and electroplated coating for durability
- IPX6 waterproof rating and extreme temperature resistance (-22°F to +176°F)
- Fits doors 1-3/8″ to 2-3/4″ thick, suitable for various door types
Pros:
– Ideal for multi-functional control and secure two-way access
– Great flexibility with auto-lock and access direction settings
– Codes update seamlessly on both sides
– Extremely durable and weather-resistant for outdoor use
– Convenient emergency power option
Cons:
– May not offer advanced app-based smart features
– Manual key required for emergency bypass
User Impressions: Similar to Product 1, users consistently highlight its reliability and the sheer convenience of having keypads on both sides. It’s often chosen for its robust build and the peace of mind it offers in settings requiring controlled entry and exit, such as community facilities or backyard pool gates.
5. Level Bolt Smart Deadbolt – Make Your Lock Smart & Invisible (Product 5)
If you love the classic look of your existing deadbolt but crave smart home functionality, the Level Bolt is your dream come true. This innovative device completely hides within your door, turning your traditional lock into a smart lock without changing its exterior appearance or requiring new keys. It’s the ultimate stealth smart lock, offering keyless entry and Apple HomeKit compatibility while maintaining your home’s aesthetic.
- Converts your existing deadbolt into a smart lock (replaces inner bolt mechanism)
- Retains your original keys and exterior hardware
- Keyless entry via Level Home App (iOS & Android)
- Share keyless access with trusted individuals
- Works seamlessly with Apple HomeKit for voice commands (Siri) and automations
- Constructed with a 6-stage stainless steel gearbox for strength and security
- Exceeds highest industry standards for security
- Designed for most American standard exterior doors
Pros:
– Completely invisible smart lock integration
– Maintains existing aesthetic and keys
– Excellent for renters or those who prefer traditional look
– Strong security features, exceeding industry standards
– Seamless Apple HomeKit integration
Cons:
– Only compatible with specific deadbolt types (check compatibility)
– Not a full lock replacement, relies on existing hardware
– No keypad or fingerprint options directly on the lock
User Impressions: Users are consistently impressed by how discreet the Level Bolt is, allowing them to keep their traditional door hardware while gaining smart features. The Apple HomeKit integration is a major plus for those already in the Apple ecosystem, providing convenient voice control.
6. BOTHSTAR Keypad Door Knob with Key, Keyless Entry Door Lock (Product 6)
This BOTHSTAR Keypad Door Knob offers dual-sided smart access with incredible flexibility, making it perfect for varied applications that demand secure, two-way control. With keypads and cylinders on both sides, identical keys, and robust weather resistance, it’s designed to provide peace of mind whether securing a residential entrance or a public access point. Its thoughtful features, like password synchronization and emergency power, make it highly user-friendly.
- Dual-sided security with keypads and identical keys on both sides
- 50 access codes per keypad with bright backlighting
- Flexible settings for automatic or manual locking (2s to 12hr delay)
- Bi-directional or uni-directional control options
- Password synchronization feature for easy code updates
- Anti-peeping code protection and low battery indicator
- Durable zinc alloy with electroplated coating and 2 solid lock cylinders
- IPX6 waterproof rating and wide temperature range (-22°F to +176°F)
- Fits doors 1-3/8″ to 2-3/4″ thick, suitable for various metal or wooden doors
Pros:
– Excellent for controlling access from both directions
– Highly adaptable with flexible locking settings
– Simplified code management via synchronization
– Built to withstand harsh weather conditions
– Emergency USB-C charging provides peace of mind
Cons:
– Primarily keypad-based; lacks biometric or app-based smart features
– Installation might require some DIY experience for optimal setup
User Impressions: Reviewers often highlight its robust construction and the practical convenience of the dual keypads for high-traffic areas. The ability to set custom auto-lock times and its durability in outdoor environments are frequently praised, making it a reliable choice for various gates and entries.
7. Kwikset 665-S Double Cylinder Deadbolt with SmartKey (Product 7)
The Kwikset 665-S Double Cylinder Deadbolt is a classic choice for maximum security, specifically designed to be keyed on both sides. This means you’ll need a physical key to operate the lock from both the interior and exterior, providing a high level of security against unauthorized entry, particularly valuable for doors with glass panes. It incorporates Kwikset’s innovative SmartKey technology, allowing you to re-key the lock yourself quickly and easily to match existing Kwikset keys.
- Keyed on both sides (interior and exterior)
- Operated solely by key on both sides
- Features Kwikset SmartKey Security for re-keying and pick resistance
- Ideal for enhanced security applications
- Please check local building codes before installation (especially for egress)
Pros:
– Superior security for specific door types (e.g., glass doors)
– SmartKey technology for quick, user-friendly re-keying
– Trusted brand reputation for reliability and durability
– Simple, traditional operation
Cons:
– Requires a key for emergency exit, which can be a safety concern
– No smart features like keypads, app control, or remote access
– Limited use cases due to keyed-both-sides operation
User Impressions: Many users choose this deadbolt for its traditional security and the ability to prevent “reach-through” break-ins. The SmartKey feature is consistently lauded for its convenience in matching locks without a locksmith, and Kwikset’s overall reliability is a common positive remark.
8. Baldwin Round, Double Cylinder Front Door Deadbolt (Product 8)
Baldwin is synonymous with luxury and quality in door hardware, and their Round Double Cylinder Front Door Deadbolt is no exception. This deadbolt not only offers the robust security of a double cylinder system—requiring a key on both sides—but also integrates modern benefits like SmartKey Security and Microban protection. It’s perfect for homeowners who want premium aesthetics coupled with advanced security and hygiene features.
- Two-sided deadbolt: Keyed operation from both exterior and interior
- Ideal for entry doors needing added security (with two bore holes)
- Easy DIY installation with just a screwdriver
- SmartKey Security technology for re-keying in seconds and pick resistance
- Fits standard doors (1-3/8” to 1-3/4” thick)
- Adjustable latch backset (2-3/8” to 2-3/4”)
- Microban Protection for 99.9% cleaner surface
- Lifetime mechanical and finish warranty
Pros:
– High-end aesthetics and durable construction
– Enhanced security with double cylinder design
– Convenient DIY re-keying with SmartKey
– Microban antimicrobial protection is a unique hygiene benefit
– Strong warranty for long-term peace of mind
Cons:
– Premium price point compared to other options
– Lacks electronic smart features (e.g., keypads, app control)
– Key required for egress can be a fire safety concern in some areas
User Impressions: Customers rave about the high-quality finish and solid feel of Baldwin locks. The combination of classic design, the SmartKey feature, and the added Microban protection makes it a favored choice for those seeking both elegance and practical security.
9. SCHLAGE B62N622 Deadbolt, Keyed 2 Sides, Matte Black (Product 9)
When it comes to robust security, Schlage is a name you can trust, and their B62N622 Double Cylinder Deadbolt lives up to that reputation. This deadbolt is designed for maximum protection, boasting an ANSI/BHMA Grade 1 rating—the highest residential security standard. Its unique “Snap ‘n’ Stay” design also makes installation surprisingly easy for a double cylinder lock, ensuring a secure fit without much fuss.
- Double cylinder operation: Keyed on both exterior and interior
- ANSI/BHMA Grade 1 maximum security rating
- Superior protection against various attack methods (crowbar, hammer, pick, kick-in)
- Unique Snap ‘n’ Stay design for easy installation
- Designed for standard door prep (fits existing pre-drilled holes)
- Ideal for exterior doors requiring additional security
Pros:
– Top-tier security rating (Grade 1)
– Exceptional resistance to forced entry
– Simplified installation process with Snap ‘n’ Stay
– Schlage’s reputation for durability and reliability
– Sleek matte black finish
Cons:
– Requires a key for exit, which might be an issue in emergencies (check local codes)
– No smart features like keypads or app control
– Limited information on specific features provided, but Grade 1 speaks volumes.
User Impressions: Users consistently praise the Schlage B62N622 for its heavy-duty construction and solid feel, instilling confidence in its security. The ease of installation, despite being a double cylinder, is also a frequently mentioned positive. It’s often chosen for its uncompromising security performance.
10. MUTEX MX920 Double Keypad Mechanical 14 Key Combination Lock (Product 10)
For those who prioritize mechanical reliability and dual-sided keyless entry without the need for batteries or wires, the MUTEX MX920 is a standout choice. This fully mechanical lock offers dual keypads to prevent “reach-through” access, making it ideal for unique security needs like pool gates or parking garages. With over 8000 possible combinations and simple code changes, it’s a rugged, low-maintenance solution for secure access.
- Fully mechanical operation: No batteries or wiring required
- Dual keypads for entry and exit, preventing reach-around access
- 14 spring-loaded keys offering over 8000 possible combinations
- Code can be entered in any order
- Easy code changing with included tools
- Durable zinc alloy body with satin chrome finish
- Drop-in replacement for standard 2 1/8” USA bore holes
- Suitable for indoor or covered outdoor areas
Pros:
– Absolutely no reliance on power/batteries
– High number of possible combinations
– Ideal for preventing reach-through entry/exit
– Robust, low-maintenance design
– Easy code changing for security updates
Cons:
– No smart features (app control, remote access, logging)
– Intermediate to advanced installation may be required for non-standard doors/gates
– Not suitable for fully exposed outdoor conditions without covering
User Impressions: Customers love the “set it and forget it” nature of this fully mechanical lock, appreciating that they never have to worry about dead batteries. It’s particularly popular for gates and secondary entries where extreme durability and basic, reliable keyless access are the primary concerns.
Frequently Asked Questions About Double Cylinder Smart Locks
Q1: What is a double cylinder smart lock?
A: A double cylinder smart lock is a type of security lock that requires a physical key to operate (lock or unlock) from both the outside and the inside of the door. The “smart” aspect means it integrates modern technology like keypads, biometric scanners (fingerprint), or app control, adding convenience and advanced features to this traditional high-security design.
Q2: Why would I choose a double cylinder smart lock over a single cylinder?
A: Double cylinder locks offer enhanced security, especially for doors with glass panes or those that could be easily breached by reaching through. Since a key is required on the inside to unlock, an intruder can’t simply break a window and turn the knob to enter. The “smart” features then add modern convenience like keyless entry or remote access without compromising this core security.
Q3: Are double cylinder smart locks safe for emergencies, especially fire?
A: This is a critical consideration. Because a key is required to unlock the door from the inside, double cylinder locks can potentially hinder quick exit during emergencies like a fire if the key isn’t readily available. Many local building codes and fire safety regulations restrict their use on primary exit doors. Always check your local codes before installing a double cylinder lock on a main egress point.
Q4: How do smart features enhance a double cylinder lock’s functionality?
A: Smart features add a layer of convenience and control. Instead of always using a physical key, you can often unlock with a code, fingerprint, or via a smartphone app. Some smart locks allow you to grant temporary access remotely, track entry/exit logs, or integrate with home automation systems, making your home security more flexible and manageable.
Q5: Can I install a double cylinder smart lock myself, or do I need a professional?
A: Many double cylinder smart locks are designed for DIY installation and come with detailed instructions, especially those designed to fit standard door preparations. However, for specific door types (e.g., very thick doors, gates, or non-standard bore holes) or if you’re uncomfortable with basic tools, hiring a professional locksmith is always recommended to ensure proper function and security.
Q6: What’s the difference between a double cylinder deadbolt and a double cylinder door knob?
A: A double cylinder deadbolt is a separate locking mechanism that typically provides additional security to a door. It’s usually installed above the door handle. A double cylinder door knob (or lever) integrates the double cylinder locking mechanism directly into the knob or lever itself. Both require a key on both sides, but the deadbolt is often considered a stronger, secondary lock, while the knob integrates the locking function into the primary door operation.
Q7: What is SmartKey technology?
A: SmartKey technology, found in certain Kwikset and Baldwin locks, allows you to re-key your lock yourself in seconds without removing it from the door or hiring a locksmith. This feature is handy if you lose a key, want to update your security, or simply want to use one key for multiple locks. It also offers advanced protection against lock picking and bumping.
Q8: How do I power a smart lock in an emergency if the batteries die?
A: Most smart locks have built-in low battery indicators that warn you well in advance. However, if the batteries completely die, many smart locks offer emergency power options. This often includes a physical key override, or a temporary USB-C charging port (as seen in some products above) where you can plug in a power bank to give it enough juice to operate temporarily.
Q9: Are these double cylinder smart locks weatherproof?
A: Many modern double cylinder smart locks, especially those designed for exterior use, come with an IP (Ingress Protection) rating, indicating their resistance to dust and water. For example, an IPX6 rating means the lock is protected against high-pressure water jets, making it suitable for all-weather use. Always check the product specifications for its waterproof and temperature ratings to ensure it meets your environmental needs.
Choosing the right double cylinder smart lock means finding the perfect balance between robust security and modern convenience. We hope this guide helps you make an informed decision and brings an extra layer of peace of mind to your home or business.