Constructed of corrosion resistant stamped 304 stainless steel. Fits all Sea-Dog^® fuel fills as well as most other fills. A multi-purpose tool that also functions as a shackle key, bottle opener, straight blade screwdriver, plus 5/16", and 7/16" hex head wrenches. A 4" B 2-3/4" C 1-1/16" D 1-3/16"