Industrial grade toggle switches 3-position momentary contact design cam action mechanism insures quiet switch action. Maintained and momentary contact switches establish circuit contact in either up or down On positions, center position Off. Automatic grounding system eliminates need for bonding jumper in grounded metal enclosure. Back and side wire terminals accept up to 10 AWG solid or stranded wire. Ground screw terminal standard 0.05 in THK steel mounting strap zinc plated for corrosion resistance. 120/277 VAC rating ideal for fluorescent lighting fixtures typical in commercial applications. Combination slot Phillips® head mounting and terminal screws ease installation (slot/robertson screws in Canada where available).