LOKmate was created & manufactured in USA.This speedy deadbolt guard is specially designed to protect your home, apartment or even hotel room. LOKmate is a deadbolt reinforcement that snap easily and quickly onto most standard conventional deadbolts to prevent breaking in by lock picking or key bumping. It will even stop unexpected entry by a person with additional keys like a landlord, maintenance person or previous tenants. With no screws or tools needed for installation, the LOKmate will take one second to install and one second to remove. The Dual Magnet version allows this portable device to be installed much easier and quicker in 3 simple steps (align to door gap, align octagon to deadbolt & placement). The strong permanent N52 magnets will prevent the LOKmate from dropping out due to door kicking or banging. The slim & light design can be easily fit inside your pocket (4.25” x 3” x .5”). Important Notes: 1) Please make sure the gap between the door frame and the door to have at the minimum of 1/16" open space for the hinge be inserted into. 2) Please make sure your door is open inward as device is not compatible with outward doors. Thank you for trying out products