The Prop Master™ is a durable molded propeller wrench designed for all 1-1/16″ prop nuts on outboards from 40 hp and up. Made from high-tensile strength nylon, it resists stripping and corrosion in saltwater environments while remaining easy to find thanks to its high-visibility yellow color. Fits all 1-1/16″ prop nuts, ideal for OMC and Mercury engines Rugged nylon construction resists stripping, fuel, sun, salt water and chemicals Includes a 9/16″ garboard drain socket on the back for added convenience