10 Best Mailbox Locks
#1 Best Pick
Leralsta Universal Letterbox Lock with 4 Keys – 16mm/18mm Lock Cylinder with 5 Adapter Plates for Mailboxes, Cabinets, Drawers & Lockers
Brand: Leralsta
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- Wide Compatibility: Crafted from zinc alloy with a chrome-plated finish, this cam lock features a 16mm cylinder and an adjustable lock plate, making it suitable for material thicknesses up to 12.5mm. Each lock includes 4 keys, and all locks are keyed differently for enhanced security.
- Robust & Long-Lasting: Built to standard size with an 18mm diameter body (19mm drill size required), this lock offers excellent resistance to oxidation, water, rust, corrosion, and abrasion—ensuring reliable performance over time.
- Easy to Install & Use: The set includes 1 lock, 4 keys, and 5 interchangeable lock plates for flexible installation. The key can be removed whether the lock is engaged or disengaged, adding to everyday convenience.
- Enhanced Safety & Privacy: Ideal for securing drawers, cabinets, mailboxes, toolboxes, display cases, RVs, and more. Keep valuable or hazardous items out of reach of kids and prevent unauthorized access.
- User-Oriented Design: Features a double-sided key for easy insertion in low-light conditions. Backed by responsive customer support to assist with any inquiries.
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#2 Best Value
Cabinet and Letterbox Lock with 5 Keys，Zinc Alloy Cam Lock for Mailboxes, Drawers,Includes 5 Adjustable Lock Plates for Secure, Robust, Suitable for Indoor and Outdoor use
Brand: AkNebriax
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- Heavy-Duty & Weatherproof Construction：Crafted from solid zinc alloy, this heavy duty outdoor letterbox lock boasts exceptional rust resistant and weatherproof properties. Its durable zinc alloy construction ensures long-term secure performance for both indoor and outdoor use, making it an ideal replacement lock for letterboxes.
- Universal Fit with 5 Lock Plates & Complete Kit：This complete locking kit functions as both a Letter Box Lock with Multiple Plates and an adjustable drawer cam lock. It includes 5 different lock plates, allowing installation on materials of various thicknesses. It’s the perfect secure cam lock for filing cabinet and toolbox or a furniture drawer security lock.
- Enhanced Convenience with 5 Identical Keys：Enjoy ultimate access management. This 5-key alike mailbox cam lock set provides 5 spare keys that are keyed alike (all keys open the same lock).
- Reliable Security for Valuables & Safety：Beyond being a high-quality mailbox lock, this lever lock provides a secure locking kit to protect your important documents, tools, and personal belongings.
- Easy Installation & Versatile Application：Designed as a standard cam lock with common mounting hole specs, it ensures easy install. This multi-purpose cam lock serves as a robust Cabinet Door Lock, Drawer Lock, Filing Cabinet Lock, and Toolbox Lock.
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#3 Budget Pick
Luzcauwy Cabinet and Letterbox Lock with 5 Keys, for Mailboxes, Cabinet Doors and Drawers, Includes 5 Adjustable Lock Plates for Secure, Durable Metal for Indoor and Outdoor Usey
Brand: Luzcauwy
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- 【Versatile Cabinet & Letterbox Lock】This zinc-alloy drawer lock features chrome plating, a 16mm cylinder and adjustable lock plate, fitting panels up to 12.5mm thick—ideal for drawers, letterboxes, cabinets, toolboxes and more, with 5 included keys for flexible security.
- 【Heavy-Duty Corrosion-Resistant Build】Made from durable zinc alloy with an 18mm diameter and 19mm drill size, this drawer lock offers strong resistance to oxidation, rust, water and abrasion, perfect for humid or high-traffic environments.
- 【Quick-Release Key Convenience】The letterbox lock design allows keys to be removed in both locked and unlocked positions, and includes 5 interchangeable lock plates for easy, tool-free installation on cabinets, RV doors, safes and more.
- 【Secure Privacy Protection】This tamper-resistant cam lock enhances privacy and protects valuables in drawers, display cases and filing cabinets while maintaining a sleek, low-profile appearance suitable for home, office or workshop use.
- 【Easy Operation with Double-Sided Key】The double-sided key design ensures smooth insertion and quick operation, even in low-light conditions, making this drawer lock reliable for everyday use.
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#4 Top Choice
10 Pcs Universal Cabinet Lock, Multi-Purpose Cam Lock Including 5 Locks Plate 4 Keys,Durable Multi-Function Letterbox Locker Locks for Cabinet, Cupboard, Mailbox, Drawer, Furniture Door & Post Box.
Brand: VNIDJGB
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- Multi-Purpose Locking Solution – Suitable for cabinets, cupboards, drawers, letterboxes, post boxes and office furniture, offering wide usability in both home and workplace settings.
- Complete Set with Keys & Plates – Includes 5 cam locks, 4 matching keys and durable lock plates for quick, consistent installation and operation across multiple units.
- Durable Metal Construction – Made from corrosion-resistant metal for long-term durability, ensuring reliable performance and enhanced security over time.
- Easy to Fit & Replace – Designed for standard panel thicknesses, these locks are simple to install using basic tools, ideal for both DIY users and professionals.
- Single Key Convenience – All locks operate using the same key, reducing the need for multiple keys and improving access management and convenience.
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#5 Popular Choice
Drawer Combination Cam Lock Password Coded Lock, 3-Digit Security Cabinet Cam Lock for Office Home Mailbox Door Storage Cabinet, 3/4 Inch Cylinder Chrome Finish, Silver
Brand: EOMECUIGAO
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- No keys required: The drawer combination lock is a secure and durable metal cam lock with 1000's of possible combinations, you can also set the desired password, default combination is 0-0-0.
- Multifunctional: Simply lock the unlock code and press the reset button while changing to the desired code, this drawer combination lock can be used as file cabinet lock, locker lock, office cabinet lock, drawer lock, mailbox lock, etc.
- Easy to use: Drawer combination lock is easy to install, to use just put in the code and turn 90 degrees to left to unlock, turn 90 degree to right to close.
- Durable and rust-resistant: These drawer combination locks feature 3 tamper-resistant chrome-plated dials and are made of sturdy zinc alloy so the locks won't rust or wear out over time.
- Cylinder diameter 3/4", please measure to ensure you are purchasing the correct lock.
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#6 Top Pick
Mailbox Lock with 5 Keys - Includes 5 Different Lock Plates, Multi-Purpose Cam Lock Including Replacement for Letterbox, Furniture, Cupboard, Dresser Drawer
Brand: Generic
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- Versatile Multi-Purpose Security：Crafted from durable zinc alloy with chrome plating, this cabinet lock and letterbox lock fits materials up to 12.5mm thick. Includes 5 keys and an adjustable lock plate for seamless use on drawers, mailboxes, toolboxes, and RV doors.
- Heavy-Duty Corrosion Resistance：Built for humid or high-traffic areas, this robust cam lock features zinc alloy construction with superior oxidation, water, and rust resistance. Its 18mm diameter ensures longevity on cabinets, safes, and outdoor mailboxes.
- Quick-Release Convenience：Effortlessly remove keys in locked or unlocked positions with this user-friendly letterbox lock. Double-sided keys enable easy insertion even in darkness, ideal for quick-access drawers and toolboxes.
- Tamper-Proof Privacy Protection：Secure display cases, filing cabinets, and drawers with this low-profile cam lock. Its anti-theft design safeguards valuables while blending discreetly in homes, offices, or workshops.
- Tool-Free Installation Kit：Install instantly on cabinets or RV doors with 5 interchangeable lock plates—no tools needed. Enjoy flexible setup and reliable support for all security needs.
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#7 Top Pick
2 Sets Security Drawer Lock Furniture Lock Cylinder Zinc Alloy Cam Lock for Mailbox Drawer Cupboard Cabinet, Silver (DUYIT07)
Brand: Mclcvp7re
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- ✔️ What You Get: We offer 2 sets cylinder drawer locks with 4 x keys, 12 x mounting screws, 2 x bezels and 2 x barrel stopper rings. The keys are not alike, and come individually unique to each lock. With more than one lock set, each key will be unique to that lock.
- ✔️ Lock Size: The size of the key lock box is 36 x 36 x 6 mm, the length of the cylinder is 22 mm, and the diameter of the cylinder is 16 mm. Lock fits 16 mm diameter drawer lock mounting hole. Due to manual measurement, please allow 1-3mm error.
- ✔️ High Quality: The lock set is made of zinc alloy and cold-rolled steel with nickle plated surface and double electroplating process, durable and more stable, anti-corrosion, anti-rust. High-quality materials and exquisite craftsmanship make the heavy duty locks durable.
- ✔️ Security and Anti-theft: Thickened base and lock plate, built-in security lock core, higher security and anti-theft performance. Thickened lock tongue makes it safer to use.
- ✔️ Wide Range of Applications: The letter box lock is suitable for drawers, cabinet, mailboxes, showcases, doors, wardrobe, cupboard, office desk, dressing table and other furniture which need lock, great for enterprise and home applications.
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#8 Top Pick
LIVDORA Cabinet and Letterbox Lock with 5 Keys, 16mm/18mm Diameter & 5 Adjustable Lock Plates for Drawers, Mailboxes, Cabinets
Brand: LIVDORA
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- 🌟【Strong Versatility】This cam lock is made of zinc alloy and chrome - plated. With a 16 mm cylinder length and lock plate, it can be adjusted to material thicknesses up to 12.5 mm. Each lock comes with 5 keys, and all locks can be opened differently. This versatile lock is perfect for various cabinet lock needs.
- 💪【Built for Durability】The cabinet lock has a standard size with a diameter of 18 mm and a drill size of 19 mm. It ensures better oxidation resistance, water resistance, rust resistance, corrosion resistance, and abrasion resistance, guaranteeing long - term use for your lock requirements.
- 🛠️【Convenient and Practical】The practical key lock set includes 1 lock and 5 keys, along with 5 different lock plates. You can remove the key from the locked and unlocked positions without any hassle. This lock provides convenient access for your cabinets.
- 🔒【Stay Safe and Private】This standard size cam lock can be installed on dresser drawers, filing cabinets, mailboxes, safes, toolboxes, cabinets, desktop display cases, RVs or RV doors. It offers additional protection for your small items and drawers, keeping your personal things safe.
- 🌟【Sophisticated Service】The cam lock set offers incredible comfort for use in the dark, providing a double - sided key so you can easily find the right key direction in the lock. If you have any questions, our support team is ready to assist you.
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#9 Top Pick
Combination Cam Lock, 3 Digit Secure Code for Office Home Storage Cabinet and Mailbox, Durable Chrome Finish, Rust Resistant, Zinc Alloy, Easy Installation, Set Your Own Code
Brand: ZoXureShop
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- Convenient Keyless Security: Embrace security with our combination cam lock, eliminating the need for keys. This advanced locking system offers thousands of possible combinations, empowering you to set your desired password. The default is preset at 0-0-0, providing easy access customization.
- Versatile Application: Our cam lock is designed for multipurpose use. It adapts seamlessly as a lock for office cabinets, mailboxes, and drawers. Effortlessly change the lock’s code by pressing the reset button whilst turning the dials to your chosen combination, enhancing its versatility across environments.
- Effortless Operation: Installing and using this lock is straightforward. Simply enter the preset or new combination, then rotate 90 degrees left to unlock and 90 degrees right to secure. This simplicity ensures quick operation, ideal for fast-paced office or home settings without compromising security.
- Built for Durability: Crafted from sturdy zinc alloy with a sleek chrome finish, this combination lock promises resilience against rust and wear. Its three tamper-resistant dials contribute to its longevity, ensuring it withstands daily use while maintaining reliable performance over time.
- Perfect Fit for Your Needs: The lock’s cylinder is precisely 30mm in diameter. Ensure precise measurements before purchasing to guarantee a perfect fit for your cabinet. This attention to detail ensures seamless integration and enhances overall security without unnecessary modifications.
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#10 Top Pick
QBXMY7 2 pcs Mailbox Locks, Mailbox Lock 16 mm, Comes with 4 Different Lock Plates, Security Mailbox Lock, cam Lock, Lever Lock, Lever Lock for mailboxes, Cupboard Doors
Brand: QBXMY7
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- Premium material: the cam locks keyed alike is made of excellent metal material made of zinc alloy, which is wear-resistant, corrosion and rust resistant, sturdy and durable for long time use.
- Easy to install: easy to install. Simply drill a hole in suitable place, insert lock head, fix tongue with fixing screw. Can be installed on metal, wood, doors, drawer panels, etc.
- Safe and reliable: the toolbox locks with keys provides you with sufficient security. Help protect privacy, assets and important materials and provide you with a safe personal space.
- Wide applications: suitable for sliding doors, cabinets, drawers, tool boxes, filing cabinets, mailboxes, furniture, RV compartments, vehicles and more. Drawer locks with keys are an extra security for important small items like documents.
- Versatile design: with 16mm cylinder length and strike plate, it can be adjusted to material thicknesses up to 12mm. This is a standard size lever lock with a diameter of 18 mm. Each mailbox lock is equipped with two identical keys to prevent one of them from being lost.
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