Lock body material: zinc alloy Surface treatment: conventional chrome plating, electrophoretic black, matte plating, titanium plating, etc. Lock body diameter the lock : M19 mm; Thread length: 20mm (short); 30mm (long) Applicable to plate thickness of 1-15mm respectively. Suitable for plate thickness 1-23mm. The factory password is: 000 How to change the password: There is a hole for changing the password at the bottom of the lock. In the open state, use a small stick to cover the hole, do not loosen it. Then change the password, release it when finished, and the password change is completed. Just mess up the password after locking Scope of application: mailbox/locker/shoe cabinet/staff cabinet/locker/wooden cabinet, etc. User guide : The factory password for this lock is 000, which is three zeros. For the first use, set the password to 000, then hold the lock body with one hand (the threaded part, pinch the two parallel surfaces with fingers), and rotate the lock surface with the other hand (is i.e. the beveled surface with lines), clockwise or counterclockwise 90 degrees. (The first time you use, you need to be a little stronger, and it will be easy to turn it a few more times) Keyless Security：This 3-digit combination cam lock is easy to install, can upgrade any standard cam lock and has the ability to be programmed in a non-resettable mode. Durable: These cabinet locks are made of heavy-duty zinc alloy, they will not rust and do not wear out over time. Notes：There is a hole behind the lock, use a small stick to press the hole and choose your new password at the same time, remember this word password, finally release the stick and your password is changed. Color: silver Quantity delivered: 2 pieces