The RocLok Hide a Key is the first faux rock key hiding system to incorporate the security of a combination lock box with the inconspicuous benefits of the traditional faux rock key hider. With no batteries to change and a built-in combination lock with 1,000 combinations, the RocLok provides homeowners peace of mind for less than one visit from the locksmith. RocLok comes in many shapes and sizes and ranges in weight from 4 to 12 pounds.