"Safety Hinged Switches combine the function of a load bearing hinge with a Category 4 (Ple) rated safety switch. They are easy to install and tamper resistant. Since they do not use an actuation key, there are no alignment or bend radius issues and they cannot be defeated with an extra key. The SHS series is available with 1 NC or 1 Changeover contact. The new SHS3 offers 2 NC\/1 NO contacts. Safety Hinged switches are available with the cable attached or with an M12 connector."