General description Made of high-quality ball bearing steel, this 7Pcs Manual Copper Pipe Swaging Tool Drill Bit set is designed for practical use in HVAC systems. The tool ensures that flares are consistently sized and fit perfectly, providing a tight fitting that simplifies brazing and reduces fatigue stress in the coupling area. Technical specifications Material: Ball bearing steel Package Contents: 1 x 5 in 1 HVAC Tools Copper Pipe Expander (sizes: 3/4 inch, 5/8 inch, 1/2 inch, 3/8 inch, and 1/4 inch) 6 x Tube Expanders (sizes: 7/8 inch, 3/4 inch, 5/8 inch, 1/2 inch, 3/8 inch, and 1/4 inch) Measurement allowed error: +/- 1-3 cm Installation Easy to install by using heat through friction to swage the pipe. The tool fits into any drill, making it efficient compared to traditional round head reaming tools. Usage This tool is widely applicable for air conditioning installation and for connecting two copper tubes. It is designed to preserve the malleability of copper during the molding