Universal Lanyard Kill Switch (1 Per Quantity) Marine emergency cut-off safety switch that attaches to your life vest while operating a boat or personal watercraft. Switch includes a lanyard Coil approximately 15" coiled/48" when stretched and weatherproof housing with brass .250" terminals. Dual circuitry allows kill switch to be wired for either ignition kill or magneto kill depending on your application. Mounting hole is 5/8" diameter and can be mounted to a panel up to 3/8" thickness.