Rotatable connection, the switch can be connected individually.Allows you to disconnect from the mains without having to unscrew it.Effective if your car is not used for an extended period of time.Avoids leakage currents.Can also function as an anti-theft device.Item Name: Cut Off Switch Material: Copper Features: Easy to Install, Universal Suitable Diameter: 17mm / 0.67" (Approx.) Size: Length: 5.8cm / 2.28", Width: 3.4cm / 1.34" (Approx.) Package Includes: 1 x Cut Off Switch Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.