【Operation】This battery kill switch is used for DC 6V 12V 24V, On/Off 2 position, Continue current systems: 200A 12V. Starting current: 1000A 12V. Recommended for mounting on the NEGATIVE terminal of the battery 【DIMENSION】2 brass terminals: 5/16", 2 mounting holes: 3/16". The base measures 2.35" in diameter, the post that holds the key stands 1 1/4" from the base and is 7/8" in diameter 【WATER RESISTANT】 This main battery switch comes with 2 keys and a waterproof cover. The red keys can be fine-tuned to limit battery drain and theft. The black cover can prevent dust and water, prolong their service life 【STURDY】 Copper terminals with stainless steel hex nuts for better continuity. Rust and corrosion resistant. The keys are made of plastic and fit snugly around the thumb for easy use 【NO BATTERY DRAIN】This key operated battery disconnect switch provides a reliable means of shutting off power during operation. maintenance and to protect the batteries from excessive draining. It also