The Precision PLS 24 PRO Concealed Magnetic Catch is deigned for a quite and strong door solution. Unlike a roller or ball catch, there is no noise when opening and shutting a door with a magnetic catch; you can just come and go without disturbing your spouse or other roommates. Additionally, these strong countersunk earth magnets never lose their power as they carry a limited . Your door will close properly at its first tap without any further adjustments. PRODUCT SPECS: Precision PLS 24 PRO Concealed Magnetic Catch Pack of 2. Heavy Duty suitable for full size doors. The door thickness should be greater than 30 mm (1.18inch). 1/2inch hole is required to flush mount magnets. Quick & easy to install Kit includes power adjustment packers, self-adhesive/magnetic cover plates. The countersink magnets and screws are covered with two discs for a clean elegant look. The kit also includes a set of round shims to incrementally adjust the distance between the magnets in order to tune the strength of the pull. Limited .