Attributes . Dual mechanical shutter system to help prevent insertion of foreign objects. Two drive screws anchor strap to back body and face where abrupt removal torque is greatest. Heavy-duty corrosion-resistant zinc-plated steel strap for added strength. Backed-out tri-drive steel terminal screws for faster installation. Internal screw-pressure-plate back and side wire capability. Two back wire holes for additional wiring flexibility. One-piece brass triple-wipe power contacts for lasting retention. . Names