Constructed with 2mm compact thick solid steel, 4mm thick front door for more security Digital and Keys Locking: security code from 3-8 digits using any number for 0-9,time out period after 3 incorrect combination attempts.and we hidden lock with one key. Two Way of Operation: digital PIN or override Key （If you forget the digital code and after 3 attempts, you need use the override key,so please keep your override key safe ） Good Hidden: Safe Size-23*17*17cm,easy to hide in any corner of the house for home, office,hotel Pre-drilled holes behind the safe with included 125px bolts for anchoring,you can mounting to the floor, wall or cabinet