This QuickCar Battery Master Disconnect Switch is the lowest priced battery switch they offer. Most racing organizations and sanctioning bodies require these for an emergency cut-off switch. The plastic casing makes it the lightest master disconnect carried by QuickCar; and with the capability to run on 350 continual amps @ 12V, it is still ideal for most racing applications. It features a red removable key and is designed for 3/8" ring terminals.