PlugKeyper Wrench Model is a boat drain plug reminder, keychain-style plug holder, and functional wrench for standard 1/2 inch garboard NPT boat drain plugs. The patented PlugKeyper design helps prevent launching or starting your boat before the drain plug is installed. When the drain plug is out, place your boat ignition key into the side of the PlugKeyper and screw the drain plug down over it. This keeps the ignition key captured with the plug, creating a simple physical reminder that the plug must be reinstalled before the boat is used. The built-in wrench gives you a convenient tool for installing or removing compatible 1/2 inch garboard NPT boat drain plugs. Attach PlugKeyper to your boat keys, trailer keys, gear bag, or dock key ring so your drain plug, reminder, and wrench stay part of the same launch routine. Great for boat owners, anglers, marinas, and anyone who wants a practical way to keep their drain plug routine organized. Built-in wrench for standard 1/2 inch garboard NPT boat drain plugs. Patented design captures your boat ignition key when the drain plug is stored in the device. Helps remind you to reinstall the drain plug before starting or launching your boat. Works as a keychain-style drain plug holder and launch reminder. Available as Wrench Model only, with one replacement plug, or with two replacement plugs. Boat key is not included. Made in the USA by PlugKeyper.