Seal Fast Brass Reducer Adapter 1913060 2 1 2 Inch FNST x 2 Inch MNPT Threaded Connection (Fire Hydrant to Standard Pipe Hose Plumbing Fitting) Caulking Guns Robust All Metal Ratcheting Chuck: Heavy duty Robust All Metal Ratcheting Chuck: Heavy duty 1 2" metal keyless chuck on the hammer drill provides superior bit retention and resists jaw slippage under high torque loads 000 RPM while pulling heat and packed sawdust away from the cutting margins Fire Hydrant Thread Adaptation: Connecting standard municipal fire hydrant outlets to standard industrial discharge pipes or commercial hoses Professional Heavy Duty Fire Hydrant Brass FNST to Male NPT Thread Reducer Adapter