Description: Solid brass nut and washer Extend the life of your vehicle's battery This product is suitable for use in professional racing cars, widely used in automotive electronics, electrical products and a wide range of automotive and marine products. Can be used as the on / off switch of any extra electrical equipment out of car (such as; Lights, fog lights, dome lights, instantaneous power, etc.). Specification: Material: brass and plastic Color: red and black Working current: 400A Chassis round diameter: 58mm Operating voltage: 60V DC Contact resistance: 50m Insulation resistance: 100M Dielectric strength: 1500VAC / 1min Electrical life: 10,000 times Screw: M10, M8. There are 4 holes and 2 holes. Package Includes: 1 Piece of Battery Disconnect Safety Kill Cut-off Switch 1 Piece of Handle Keys