Don't get to the boat ramp and realize you forgot to bring your boat plug.  Keep one always on your boat.  This plug tool comes in both 1/2" NPT and 3/4" NPT and is made of all non-rustable materials so you can leave safely on the boat and not have to worry about it rusting.  Seat the square socket over your boat drain plug to install it before launch or remove it after haul-out.
 
The textured body gives your fingers a broad grip. Thread your spare into the opposite end to keep it with the tool.
 
The bright tether connects the tool to a 15lb ONKIJA Boga float so you can spot and recover it if it slips overboard. Each kit includes one tool in your selected size and color and one tethered float. Spare drain plug not included.