Designed to withstand abuse and constant use in demanding applications, these durable switches virtually eliminate contact bounce and arcing. Exterior housing is made entirely of high performing chemical and impact resistant thermoplastics to withstand the abuse of industrial environments and harsh chemicals. Featuring auto-ground and external, screw pressure plate back wiring on all terminals for fast, easy installation and excellent electrical connection. Oversize silver alloy contacts help ensure long life and better heat dissipation.