5pcs Tool Drill Bit Set Copper Pipe Flaring Tools with 1/4'' 3/8'' 1/2'' 5/8'' 3/4'' Bits Multifunction Tube Expander Portable

【Tool Kit】 Come with 5 different sizes: 3/4", 5/8", 1/2", 3/8", 1/4"; Hex Shank Diameter: 1/4 inch. They can meet your various work needs! 【High Quality Material】Made of bearing steel for durability. drill bits have high and uniform hardness and wear resistance, will always have the size and fit perfectly. 【Pipe Expander】The innovative drill bit expander for expanding tubes using heat by friction way more surface of between the flare and the Valve. 【Copper Pipe Swaging Tool】When air conditioning is installed, expand copper tube, make two copper tube mutual link (The drill bit is installed on hand electric drill) 【Drill Bit Expander】This swages tool present a perfect depth and a tight fitting, which will make the brazing easier, reducing the fatigue stress over the coupling area.