Defaons Swaging Tool Drill Bit Set, 6Pcs Portable Copper Pipe Swaging Tool Drill Bits Set with 7/8", 3/4", 5/8", 1/2", 3/8", 1/4"

Brand : Defoans Bit Set : 7/8", 3/4", 5/8", 1/2", 3/8", 1/4" Premium Quality * When the air conditioner is installed, expand the copper pipes so that the two copper pipes are connected to each other. (Need to be installed on a hand electric drill) * Made of bearing steel material. It has high and uniform hardness and wear resistance, and high elastic limit * Function : When the air conditioner is installed, expand the copper pipe to make the two copper pipes interconnected.(it needs to be installed on an electric drill) * the copper pipe swaging drill bit can an inserting auxiliary tool (cross scredriver, etc.),which can be used as a manual tube expand