This swaging tool drill bit set is made of premium metal materials, high-temperature resistance, wear resistance, and not easy to break for . Adopting hexagonal handle design, the swaging tool drill bit set can be perfectly matched with the hand electric drill to unfold the copper quickly, saving your time and effort. Features - Color: Black. - Material: Metal. - Made of metal material ,it has high and uniform hardness and wear resistance, and high elastic . - High-temperature method preserves malleability, preventing cracks and leaks, perfect for installers,the method is much faster than the conventional method. - A product of the swaging process with this tool making their way into HVAC systems, perfect for installers, no matter a beginner or an expert. - When air conditioning is installed, expand the copper tube, make two copper tube mutual links. - Accurate: The flares will always have the same size and will fit perfectly. Package list: 1 x Tube Expander