Digital Lock Safe constructed from solid steel to resist attack from hand and power tools with memorable 3-8-digit letter, number or both for utmost protection. Cubic Feet: 0.58 interior & 0.77 exterior. Strong mechanism with 2 locking bolts. Separate emergency key - lock override. Solid steel construction, pre-drilled holes for mounting to any surface. Electronic Lock, Emergency Key Override, Compact Design. Electronic lock can be programmed with any combination of 3 to 8 numbers giving millions of potential personal codes. Compact safe with high security electronic lock. Batteries and floor mat included. Easily attached to any surface with pre-drilled holes and included mounting bolts.