Sturdy Material: Protects your key from damage by hammer, saw, drill, and so on. The instruction guide walks you through the steps to reset your access code at any time. Easy to Install: Installation with pre-drilled holes is super easy. Large Secure Storage: External dimensions: 114mm long, 94mm wide, 40mm thick, holds up to 5 keys. Wall Mounted Weatherproof Aluminum Alloy Key Box with 4 Digit Combination for Indoor and Outdoor Use Color: Black, Gray. Material: Aluminum Alloy. How to Use: 1. Pull the weather cover down to reveal the dials. 2. Turn 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 Dimensions: Approx. 90 x 62 x 30 mm. Note: 1. Keep the cover closed to increase weather resistance. 2. We do not recommend using the combination such as "AAA" which is easy to crack. 3. It is recommended to rotate the dials for a week to keep them moving freely. Package Contents: 1 x Key Storage Box Only the above package content, no other products are included. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. The measurement allowed error is +/- 1-3cm.