ccbetter QN16A1 Momentary Metal Push Button Switch 3A/250VAC 1NO SPST Industrial Car Switch with 2 Pins Suitable for 16mm 5/8" Mounting Hole - Black Shell Brand new and durable,mechanical life for 500,000 cycles. Metal material,high quality, high-grade appearance and nice touch feeling. Be widely used in various types of motor starting,power starting device,and can be also be a access control button. Easy to install, screw clamp type terminals to make fitting very easy. Momentary Type:Push on, Realse off.