Stamped 304 Stainless. The ultimate Deck Plate Key will fit all Sea-Dog fuel fills as well as most others on the market. Also included on the key is a shackle key, bottle opener and a straight blade screwdriver, plus 5/16" hex head and 7/16" hex head wrench. 4" Wide. Sea-Dog Line is a 3rd generation family company with a history of satisfied customers stretching back to the company's start in 1933. The company is the recipient of multiple industry awards for quality and efficiency.