Pass & Seymour® Non-fusible interlocks are easy to apply, thanks to their versatile, adjustable mounting feet, compact dimensions, and flexible wiring via either top or bottom feed. And once installed, they'll withstand tough conditions including water in wash down areas, contamination from shavings, dirt, and dust, accidental impacts, heat from furnaces, welding or other processes and vibration from any type of equipment. Here's the safety that goes beyond ordinary requirements. These interlocks feature a patent pending, tamper resistant activating assembly and cover integral switch mechanism that protect against unauthorized overrides. And high visibility ON/OFF designations plus a hefty black/red handle make status easy to read at a glance.