Robust Material: Our box protects your keys from damage caused by hammers, saws, drills and so on. The instruction guide shows you how to reset your access code at any time. Easy Installation: Installation with predrilled holes is super easy. Secure Storage: External Dimensions: 114mm long, 94mm wide, 40mm thick, holds up to 5 keys. Color: Black, Gray Material: Zinc alloy + ABS plastic (shell is made of plastic) User Manual: 1. Pull down the weather cover to reveal the knobs. 2. Rotate the knobs to the current combination. 3. Pull the door fully open and add or remove keys. 4. Close the door, adjust the combination to lock the door and hide your combination. 5. Close the weather cover. Inner Size: Approx. 90*62*30mm Note: 1. Keep the weather cover closed to increase weather resistance. 2. We do not recommend using combinations such as "AAAA" as they are easy to crack. 3. It is recommended that the knobs be rotated weekly to keep them movable. Package Contents: 1 x Key Storage Box 4 x Screws 4 x Expansion Tubes 1 x User Manual (English) The above package contents only, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is .