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. Air conditioner copper pipe flaring tool is made of HHS steel, which has high and uniform hardness, wear resistance, and high elastic limit. 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. 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. Colour:As Shown Material:High Speed Steel Package Contents: 1set * refrigeration tools Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.