Features Enhanced Durability and Safety: Our Swaging Tool Drill Bit Set features a robust hex handle design that securely locks into place, preventing slips and ensuring a safer operation. Ideal for expanding copper pipes without the risk of cracks or leaks, ensuring a reliable and long-lasting connection. Efficient Pipe Expansion: Specifically designed for precise expanding of copper pipes, our Hexagonal Shank British Pipe Expander ensures a tight fit for air conditioning installation. Preserve the ductility of the copper during expansion, minimizing the risk of damage and future leakage. Universal Compatibility: Equipped with a versatile hex shank, this tool set fits seamlessly into standard hand tools, enhancing stability and reducing the risk of accidents during use. Experience a confident and smooth operation every time. Comprehensive Size Range: This kit includes 6 different sizes of expanders: 7/8", 3/4", 5/8", 1/2", 3/8" and 1/4", making it a perfect fit for a variety of air-conditioning copper pipe diameters. Whether you are a professional or a DIY enthusiast, this set meets all your pipe expansion needs. Superior Material Quality: Constructed from high-strength bearing steel, our Round Handle Tube Expander offers exceptional durability and resistance to deformation. With great elastic limit and fatigue strength, it promises longevity and top performance even under rigorous use. Feature: Crafted for Reliability: Engineered from bearing steel, this set of tube expanders offers exceptional resilience and contact fatigue resistance. The blackened surface treatment ensures longevity, maintaining its integrity even after prolonged use. Perfect for expanding copper pipes in air conditioning installations without causing damage. Not Easy To Fall Off: The standard hex handle is not easy to fall off when installed on tools such as electric drills. It has perfect depth and close fit, which will make brazing easier and reduce fatigue stress in the coupling area. Good Ductility: It can maintain good ductility during the expansion process, which can prevent the copper pipe from cracking and leaking. The full range of forging tools can easily expand the HVAC pipe, and the forged plug will provide a large exchange depth to achieve a perfect fit. Purpose: This pipe expander is mainly used to expand copper pipes when installing air conditioners and connect two copper pipes tightly; it is very suitable for installers, whether you are learning or already doing it, it doesn't matter. Specification: Item Type: Tube Expander Material: Bearing steel Surface Treatment: Blackening How to Use: When installing the air conditioner, expand the copper pipes so that the two copper pipes are connected to each other. (Needs to be installed on a hand electric drill) Specifications: 7/8in (approx. 22.2mm / 0.9in), 3/4in (approx. 19mm / 0.75in), 5/8in (approx. 15.9mm / 0.6in), 1/2in (approx. 12.7mm / 0.5in), 3/8in (approx. 9.5mm / 0.4in), 1/4in (approx. 6.3mm / 0.25in) Package List: 6 x Tube Expander 1/4'', 3/8'', 1/2'', 5/8'', 3/4'', 7/8'' Drill Bits Set Package List 6 x Tube Expander