The Trigger Switch is responsible for signaling whether a quarter, dime, or nickel was received by the mechanical coin acceptor. - Coin levers are wider than normal to ensure that coins do not jam between the lever and the edge of the channel wall (especially important with dimes). - Compatible with just about any GTE/Quadrum style payphone housing (right side coin slot). - Mounts directly beneath the mechanical coin acceptor and attaches to the top of the coin hopper. - Mounting screw included.