5Pcs Swaging Tool Drill Bit Set, Bearing Steel Air Conditioner Copper Tube Expander Swaging Tool with Hex Handle

How to Use: When installing the air conditioner, expand the copper pipes so that the two copper pipes are connected to each other. (Needs to be installed on a hand electric drill) Specification: Item Type: Tube Expander Material: Bearing steel Surface Treatment: Blackening Shank Diameter: 1/4in (approx. 6.35mm / 0.3in) hex handle Specifications: 3/4in (approx. 19mm / 0.75in), 5/8in (approx. 15.9mm / 0.6in), 1/2in (approx. 12.7mm / 0.5in), 3/8in (approx. 9.5mm / 0.4in), 1/4in (approx. 6.3mm / 0.25in) Package List: 5 x Tube Expander