Package include: 1* Keylock Selector Switch 1* Wire Connector Sockets 2* keys What's the Wire Connector: With the wire connector, you don't need to solder the terminals, make installing very easy Saves the issue of soldering to the switch, and possibly melting it as well You can replace the switch anytime by just unplugging the switch from its socket What's Selector Switch Used for: Scope of application: punch, Automation equipment,Testing instrument and other circuit equipment.used widely to control the electronmagnetic Starter contactor,relay and other automaatic control electric circuits. What's Note: -The project you are going to be used for, don't let current go above 5 amps. Or the switch will get warm and to be burned out. What's Customer Support: If you have any questions, feel free to contact us by E-mail any time. We get professional customer service staff and technician to help you. Specifications: Head diameter: 22mm Mounting hole size: 0.75" (19mm) Switch combination: 2 Position,1NO 1NC SPDT Switch rating: 5A/250VAC Head shape: Round Cap Protection level: IP54