This engine stop switch is made of high quality plastic material, which is waterproof and durable. With flexible recoil cord tether, reliable to use Engine kill switch is designed as a fail-safe to prevent a runaway vessel in the event the operator falls overboard, a quick pull on the lanyard stops the engine Simple installation, easy to mount on the handlebar. Fast assembly without tool Fits most ATVS and motorcycles, lawn mowers or outboard motors without battery & electric start.