Material: The code lock is made of zinc alloy, sturdy, precise, safe, corrosion resistant and durable. Adjustment: The initial password for the lock code is 000, and there are 1000 password combinations. You can change the password yourself. You don't need to install any screws to install the lock directly on the case. When changing the password, the hand should always hold the hole for the code until the password is changed. Installation: No screws needed, easy to install, multi-coded lock options for use in cabinet of different thickness. Application: It can be used for filing cabinet, mailbox, drawer, locker, shoe cabinet, staff cabinet, wooden cabinet, metal cabinet, etc. Service: If you are not satisfied with the product, please contact us directly, we will provide you with refund service at any time.