Camco 30AM/15AF Power Grip Marine 12" Dogbone - M-Locking/90F Adapter [55616]30AM 15AF Power Grip Marine 12" Dogbone M Locking 90F Adapter The Camco 30 amp male locking end to 15 amp female standard end adaptor is a 12 inch adapter cord with a threaded locking ring that creates a weatherproof connection on the 30 amp male side. The durable STW cord is used to convert a 30 amp marine type connection to a 15 amp standard receptacle. Use this adaptor to plug in common tools, radio, lights, blender, etc. to a marine type power