Factory-terminated devices and connectors mean that device installation is the same regardless of skill level of the installer. The UL Listed connectors are keyed to ensure proper wiring installation into each receptacle. The connector simply snaps into the back of the device - no fussing with wires, stripping or tightening screws. Plug Tail devices are finger-safe with no exposed terminals, so taping is not required. Now device installation is a snap! 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. Oversize silver alloy contacts help ensure long life and better heat dissipation.