WirthCo 20168 Battery Doctor Knife Switch (Post to Eye)
Battery doctor. The easy way to disconnect electrical power on any vehicle, without tools. Simply lift the knife; power is cut. Prevents shorts and fires when working on electrical systems; discourages theft; eliminates battery drain on idle batteries. California prop 65 - warning, this product contains chemicals known to the state of California to cause cancer, Birth defects or other reproductive harm.