Outfit nearly any switch, including toggle and decora styles, with this adjustable device. It’s designed to go on easy and keep the energy off during maintenance and repair. Easily installs over wall plate using existing screws. Hinged cover conveniently flips up for on/off adjustment and snaps closed to keep switch locked in position using padlock or hasp (sold separately). Trilingual labels (English, French and Spanish) help keep all employees informed and instructed. 2.38 in. to 3.81 in. screw install range and 0.8 in. max. toggle length accommodate a range of sizes.