This HVAC Repair Tool has 5 different sizes of drill bits, including 1/4inch(6MM), 3/8inch(10MM), 1/2inch(12MM), 5/8inch(16MM), 3/4 inch(19MM). Due to the heat generated by the copper pipe and copper pipe expander in the expansion, please do not touch directly with your hands, wait for the copper pipe to cool down, and then operate to avoid injury to your hands. This Air Conditioner Tube Expander Tool is made of high quality metal with high temperature hardening process. Durable, heat and wear resistant, not easy to break and deformation, safe to use. The Air Conditioner Copper Pipe Expander Swaging Tool works with an electric drill, making it easy to expand copper pipes. The electric drill is highly efficient and fast, saving more time and providing significant results. Use the electric drill Swaging Tool not only can expand the copper pipe, but also expand the pipe mouth function, 5 sizes of drill bit, suitable for most of the copper pipe, help air conditioning repair, refrigerator repair, copper pipe repair and other scenarios. Electric Drill Swaging Tool Drill Bit compared with other copper pipe flaring tools, our 5-in-1 drill bit kit can be carried around or placed in the tool box, does not take up the volume, and easy to carry and store Colour:black Material:Metal Package Contents: 1 x HVAC Repair Tool 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.