Heavy duty enclosures for dusty environment, BallBush bearing options for Cam Shaft, Wide over travel of the lever is permissible without damaging switch element, Robust spring to absorb impact from dog, Grade of protection IP 65, Contact combination 1N0+1NC 2N0+2NC, Heavy duty contacts 10 AMP @ 110230500 Volt Ac, Retaining type screws for shrouded cover, Toggled typeV leaver type limit switch.