Feature: 1. Sturdy material: Let our lock box protect your keys from damage by hammers, saws, drills, etc. 2. Easy to install: It is straightforward to install using pre-drilled holes. 3. Large safe storage: Dimensions: length 114mm, width 94mm, thickness 40mm, can hold up to 5 keys Instructions for use: 1. Pull down the time cover to expose the dial. 2. Rotate the dial to the current combination 3. Pull the door fully open and add or remove keys. 4. Close the door, readjust the combination dial to lock the door, and hide your combination. 5. Close the time cover. Internal size: about 90*62*30mm notes: 1. Keep the weatherproof cover closed to increase weather resistance. 2. We do not recommend using a combination like "AAAA"; it can be easily broken. 3. Turning the dial every week is recommended to keep it moving freely.