Flaring Tool Drill Bit Set With 7/8(22.2mm),3/4(19mm),5/8(15.9mm),1/2(12.7mm),3/8(9.5mm),1/4(6.3mm) Copper Pipe Swaging Tool is made of ball bearing steel, rugged and easy to use, good assistant for work and life 6 pcs Flaring Tool Drill Bit, 7 different size, sufficient quantity, complete specifications, perfect to complete your work needs Air conditioning installation, open copper tube, so that two copper tube mutual link Swaging Tool Drill Bit Set works for both hard and soft copper Standardized, easy to braze swages in one set When installing the air conditioner, expand the copper pipe to connect the two copper pipes with each other. (It needs to be installed on a hand drill). Drill Bit Expander Set is suitable for hard and soft copper standardized, easy to braze swaging set. Sufficient quantity, complete specifications, perfect to complete your work needs. Feature Tube expanders -Color: Black. -Material:Bearing Steel. -Size:4.5cm/1.77inch, 5.5 cm/2.16inch, 5cm/1.96inch. Type:7/8(22.2mm),3/4(19mm),5/8(15.9mm),1/2(12.7mm),3/8(9.5mm),1/4(6.3mm) -Handle diameter: 7mm (triangular handle). -Surface treatment: blackening. Package Including 6 *Tube Expanders