Crafted by artisans, it is made of high-quality metal and undergoes high-temperature hardening treatment, making it , heat-, wear-, and reliable. Efficient work: The air conditioning copper pipe expander conversion tool seamlessly matches with the electric drill, providing fast and efficient results, saving time during HVAC maintenance. This electric drill swing tool can not only expand copper pipes, but also be used as a pipe expander. Suitable for air conditioning maintenance, refrigerator maintenance, etc. This HVAC repair tool comes with 5 different sizes of drill bits (1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch) to effectively expand copper pipes. [ Convenient to carry ] Unlike other copper pipe expansion tools, this 5-in-1 drill bit set is compact and portable, making it easy to carry, use, and store in a toolbox., Manufacturer: Jnchdghwa