Battery cut of switch - exactly like Lucas SSB106 but made by Durite in the UK (Most likely made on old Lucas tooling) The original Lucas item is no longer available - this is exactly the same with the exception of not having the Lucas name molded into the white plastic base - you don't see this area once installed. Designed to stop battery drain, make working on your car safer and reduce the chance of your car being stolen etc. Rated at - 100A Continuous at 12/24volt Mounting hole diameter - 3/4" (19mm)