This marine emergency cut-off 7 Key Universal Kill Switch with Lanyard attaches to your life vest while operating a boat or personal watercraft. Designed to instantly cut battery power when detached. The 7 key 50” lanyard fits OMC®, Johnson®, Evinrude®, Mercury®, Mariner®, Force®, Yamaha®, Honda®, Tohatsu®, Suzuki®, and Nissan® kill switches. Constructed of injection molded nylon and Delrin.