ALEKO S57 Premiere Electronic Digital Safe Home Security Safe Inside tamper-proof hinges; Constructed with solid steel to resist hand and mechanical tool attacks Constructed of extra thick 11 gauge solid steel; Inside tamper-proof hinges; door opens to right Opens with secret PIN code or included keys (2 Keys Included!); 3 to 8 numbers Code can be changed infinitely. Runs on AASIZE(1.5V) batteries External Dimensions:22.5" H x 15" W x 14.25" D. Internal Dimensions: 22" H x 14.5" W x 14" D.