Feature 1Battery Disconnect Switch: Safely disconnect the power to electrical systems to prevent electrical fires and theft when devices are not in use, shut off power during maintenance to protect the battery and reduce excessive battery consumption. 2Application: Universally used for trucks, cars, RVs, trailers, boats, marine, or any vehicle with 39mm diameter terminal. Disconnect the battery when you are not driving a car boat RV vehicle ATV trailer off road, etc. Always ensure your safety. 3Enhanced Connectivity: Two copper terminals with stainless steel hex nuts on the base for improved continuity, and erosion resistance, adds to its long lasting performance. 4Easy to Use: Knob detachable and with a spring, this car battery disconnect switch can be controlled by switching to a 45 clockwise position, ensuring fast setup. 5High Current: This battery power off switch rated current is 500A, operating voltage is 12v/24v, with M10 stud, stud has a center distance of 39mm. Item Type: Battery Disconnect Switch Material: Metal + Copper Working Voltage: 12v/24v Rated Current: 500A Bolt Thread Size: 10mm / 0.4in, M10 Bolt Center Distance: Approx. 39mm / 1.5in Fitment: Suitable for RVs and Yachts Package List 1 x Battery Disconnect Switch Kit (4 Accessories)