6 different sizes, including 1/4In 3/8In 1/2In 5/8In 3/4In 7/8In swaging tool drill bits. copper pipe expansion tool can be directly connected to most electric drills. The copper pipe expander can be rotated to expand the copper tube and connect it in a leak-proof way. Please wear safety equipment and do not drill too fast. Air conditioner copper pipe flaring tool is made of HHS steel, which has high and uniform hardness, wear resistance, and high elastic limit. The bit holder keychain is suitable for most drill bits with a 1/4in hex shank and 1/4in hex socket, push it to unlock and easily hang on the tool bag. This HVAC repairing set is perfect for air conditioner repair, refrigerator repair, copper pipe repair, aluminum pipe repair, etc. The ac tool for hvac is also a cool gadget gifts for men., Weight: 0.41557136387 pounds, Manufacturer: Hipzeepo