Material: Solid Steel.Opens with digital PIN or included override key. Hidden lock with two keys PIN numbers can be programmed 3 to 8 digits with any number from 0-9, 3000-time operation life expectancy of battery.Mounted to the wall or floor. 4 anchor bolts are included, back and bottom of safe totally have 8 install holes.Thickness for Body:2mm.Thickness for Door:4mm. Exterior dimensions: 19.7"H x 13.8"W x 12.2"D.Interior Dimensions: 19.5"H x 13.5"W x 11.5"D.Door opening: 12.5"W x 17.5"H.Time Out Period: After 3 wrong entries.Carpet padding on inside bottom.Original code: 159, then press A or B. Pre-drilled holes inside the safe with fixing bolts allowing anchoring. 4 pcs Bolts included Weight : 37LB, Color: Black NOTE: The safe runs on 4 x AA-Size 1.5V batteries are included.