These handy tools make fastening PEX pipes to plywood subfloor and wooden studs an easy task. Simply load the gun with the stand-off clips, press down on the clip gun and the PEX pipe will remain steady. Excellent for installing underfloor heating and radiant heating systems. Nations WareHouse offers stand-off clips for different sizes of PEX pipe, and pneumatic or manual clip guns. Clip guns are designed and manufactured by Peter Mangone in the USA