Lockout tagout plug lockout is best used for electrical lockout applications as part of a comprehensive OSHA compliant lockout tagout safety program Fits two prong plugs with and without ground; Patented plug lockout grips prongs of 110 - 120 volt plugs Protects against accidental reconnection during maintenance and repair; Includes labels in English, Spanish and French Accepts 3/16 in. (4.8 mm), 1/4 in. (6 mm) and 9/32 in. (7 mm) padlock shackle diameters Includes one plug lockout device (Safety padlocks and lockout hasps sold separately)