Sturdy Material: This lock box helps protect your keys from damage caused by hammers, saws, drills, and similar tools. The instruction guide provides step-by-step directions to reset your access code at any time. Easy to Install: Pre-drilled holes make installation simple and secure. Secure Storage: Outer dimensions: 114mm long, 94mm wide, 40mm thick. Interior space can hold up to 5 keys. Color: Black, Gray Material: Zinc alloy + ABS plastic (the shell is made of plastic) Instructions for Use: 1. Pull the weather cover down to reveal the dials. 2. Rotate the dials to the current combination. 3. Pull the door fully open and add or remove keys. 4. Close the door, realign the combination dials to lock the door and conceal your combination. 5. Close the weather cover. Inner Size: Approx. 90 x 62 x 30mm Notes: 1. Keep the weather cover closed to improve weather resistance. 2. Avoid using easily guessable combinations such as "A-A-A-A". 3. It is recommended to rotate the dials weekly to maintain smooth operation. Package Contents: 1 x Key Storage Box 4 x Screws 4 x Expansion Tubes 1 x User Manual (English) Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the photo and the actual product. Measurement allows an error of +/- 1-3cm.