Gunnar Kill Switches are designed to work safely and correctly with a unit’s electrical system. The packaging has an application chart on the back to make sure you hook your customer up with the right switch for his unit with fitments for both NO (normally open) and NC (normally closed) electrical systems. The switches connect easily to the system, and its narrow design fits easily to any handlebar. The switches include hardware and are avaiable in black, blue and red starting at $39.99.