The GRI MS29PA-W Magnetic Contact by George Risk Industries offers enhanced security with its advanced Magnasphere Technology. This surface mount switch features spherical magnetism that resists magnetic tampering and defeat attempts, providing reliable protection. It is hermetically sealed for durability and includes screw-down flanges for secure installation. Concealed terminals (on MS28), optional built-in E.O.L. resistors and diodes, and the availability of switches and magnets separately add versatility. Choose from white, brown, or gray colors to blend with your decor. Upgrade your security today with this dependable switch set.