"Safety switch, cable-pull interlock operated, with reset, protection up to 50 meters (164 ft.), 1 N.O. and 3 N.C. contacts with slow action break before make, emergency stop button, one red and green bi-color steady 110VAC LED, 57mm wide, die-cast aluminum body, three conduit openings accept 1\/2 inch NPT fittings. Includes one tamper-proof T20 Torx bit. Order cable separately."