Description: Mechanical code lock construction, no need power supplier, durable and stable. 4-digit code for maximum security and safety, set your combination with ease. Waterproof cover to protect the dial from bad weather. The lock box packing includes screws and anchor bolt to mount the lock box on wood, steel, tile, drywall, and more. There are four pre-drilled holes in the back side of the box for easy mounting. Key box has a spring structure. Enter the correct password, dial the button, the key box will automatically open, do not need to manually pull, and convenient. Specification: Material: Zinc Alloy Size: Approx. 95x115x40mm/3.74x4.53x1.57inch (LxWxH) Package Includes: 1 Piece Key Lockbox 1 Bag Screws 1 Piece English Manual Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Meanwhile, please be reminded that due to lighting effects, monitor brightness, contrast settings etc, there could be some slight differences in the color of the pictures and the actual item.