Heavy Duty AC/DC Rated Keylock Switches are composed of both movable and stationary silver cadmium oxide contact material. The 7842 Series Screw Terminals are brass designed to accept #7-32 x 3/16 binding head screws, and the 7846 Series utilizes brass quick connect terminals. The high current switching capability of Heavy Duty AC/DC Rated Keylock Switches allows them to be used for locking switching circuits in power applications.