Are you you are contraceptive device behind locked doors ? . The Lock Locker is to prevent ANYONE from unlocking your bolt EVEN if they have a change chord, bump chord, 3D printed chord or construct picks. Did you that 95 % of the homes in America are not saved even up when their doors are locked ? . That because intruders know how inefficient deadbolts really are. The Lock Locker an artifact layer of security for you and your family. to bed at night feeling more batten down knowing that your deadbolts are locked and will stay locked ! .