Description: 1. It is convenient to temporarily turn off the power of the vehicle during vehicle maintenance. Extend the service life of car batteries. 2.The current can be disconnected and reconnected with a simple rotation operation. To ensure that the battery is completely disconnected, please turn the knob 4-5 times. 3.This design is an effective way to solve the problems of leakage and power loss. 4.High conductivity: zinc alloy, brass coating, stable performance, corrosion resistance. 5.Please Note: Please install on NEGATIVE pillars. Suitable for car battery pole about 15-17mm/0.61-0.67in. Specifications: Name: Car Battery Switch Material: zinc alloy copper plated Weight: about 150g Withstand current: 150A Aperture: about 15.5-17MM/0.61-0.67in Suitable for battery terminal: about 15.5-17mm/0.61-0.67in Function: Protect the battery and prevent discharge Packing List: Car Battery Switch*1 Notes: 1. Due to the lighting effects and shooting angles, there is color difference in the product, please understand. 2. Due to manual measurement, there is a tolerance in the product size.