Easy to install and disassemble: Screw terminals, no need to solder. Waterproof, rustproof, can be used in humid or dusty environment. Switch Type: Dustproof Metal Push Button Switch. Mounting Hole: 16mm. Operation Type: Momentary Switch (Self-return). Momentary Type: Push & Go. Hold - ON, Release - OFF.Contact: 1 NO (Normally Open).Connection: 2 Screw TerminalsApplications: Widely used in cars, trucks, boats, ignition systems, doorbells and other equipment that uses a momentary switch.The metal push button is also used for circuit control in starter, contactor, relay and other electrical circuits.(Suitable for 16mm diameter mounting hole)Stable and Reliable Performance: High quality ROHS approved material, durable and reliable, shockproof, durable, practical.Can be cleaned and maintained easily, excellent quality and long service life