Product overview Mechanical alloy combination lock designed for cabinets, drawers, mailboxes and lockers where keys are impractical. Simple, keyless security with a resettable 3digit code and compact dimensions for easy installation. Key benefits Keyless convenience: threewheel mechanical code eliminates the need for keys and spare key management. Resettable combination: factory code 000 can be changed by the user to a custom 3digit code. Durable construction: alloy body built for regular use. Compact fit: cylinders fit installations up to 5/8 inch (about 15 mm) thick. Reliable operation: 90 degree turn action for straightforward locking and unlocking. Primary features Initial code: 000. Code change: press the hole behind the faceplate with a small stick while the lock is in the unlocked position, set your 3digit code, then release to store the code. Material: alloy. Operation: 90 degree turn. Color options: silver or black. Quantity: 1 piece, mailbox style lock. No retail package. Dimensions (approximate) Overall length: 44 mm To centre of lock: 34 mm Body diameter: 19 mm Face diameter: 38 mm Face depth: 17 mm Length from back of lock to end of lock body: 20 mm Additional length: 23 mm Across flats: 16 mm Compatibility and use cases Ideal for letter boxes and mailboxes. Fits drawer cabinets and office furniture where keyless access is preferred. Suitable for metal cabinets and school lockers. Note: not suitable for double door cabinets. Troubleshooting tips If the lock feels stiff or the code is correct but the cam will not rotate, try this: wiggle each of the three wheels left and right, reset the wheels to 000, hold the cam in the release position and apply a little force to turn it to the locked position. This typically frees the mechanism after transit. Additional notes Cylinders fit installation thickness up to 5/8 inch about 15 mm; refer to photos for installation details. Please allow 1 to 10 mm variation from listed measurements due to manual measurement and 0 to 10 mm error for other dimensions. Color appearance may vary slightly between monitors. Package contents 1 mailbox lock (mechanical 3digit combination)