6pcs HVAC Repairing Set Air Conditioner Copper Tube Expander Swaging Tool Manual Pipe Swage Expander Drill Bit Soft Copper Tubing Bit with 1/4'', 3/8'', 1/2'', 5/8'', 3/4'', 7/8' Bits - Hozzwhoo, AH2306006

• 【MATERIAL】Made of bearing steel. It has high and uniform hardness and wear resistance, and high elastic limit. 【INNOVATION】Revolutionizing system for molding tubes using heat by friction way more surface of between the flare and the Valve. 【Multi Size】7/8", 3/4", 5/8", 1/2", 3/8", 1/4", 6 different sizes per set of your choice to meet your needs. 【Function】Ideal for HVAC installers to perform air conditioning copper pipe reaming operations without complicated learning. (To be installed on hand electric drill.) 【Easy to Install】Perfect for installers, no matter if you are just learning or have been doing it.