Stable And Reliable Performance: High Quality, Rohs Approved Material, Durable And Reliable, Shockproof, Durable, Practical. Can Be Cleaned And Maintained Conveniently, Excellent Quality And Long Service LifeApplications: Widely Used In Cars, Trucks, Boats, Ignition Systems, Home Doorbell And Other Equipment Which Uses Momentary Switch . The Metal Push Button Switch Is Also Used For Circuit Control In Electromagnetic Starter, Contactor, Relay And Other Electrical Circuits. (Suitable For 16Mm Diameter Mounting Hole)Easy To Install And Disassemble: Screw Clamp Type Terminals, No Need To Solder. Waterproof Protection, Rustproof, Can Be Used In Humid Or Dusty EnvironmentService Guarantee: 100% Test Before Shipping To Ensure Product Safety, Stability And Durability. We Provide 100% Perfect Customer Service, Any Questions Please Feel Free To Contact UsSwitch Type: Metal Push Button Switch Waterproof Dustproof. Mounting Cut Hole: 16Mm. Type Of Operation: Momentary Switch (Self-Return). Momentary Type: Push & Hold - On, Release - Off. Contact: 1 No (Normally Open). Connection: 2 Screw Terminals