Draft Beer Repair Wrench Set Everything you need to fasten and unfasten the most common draft beer fittings. Always great to have on hand! Heavy duty beer faucet and hex nut wrench made for tightening and loosening faucets and hex nuts. CO2 Air Tank Wrench stays attached to CO2 or nitrogen tank. Double ended draft beer tower wrench has both 1" and 1-16" open ends for easy access in towers.