Feature:1. 6 piece set, with the most common HVAC pipe diameter: 1/4inch, 3/8inch, 1/2inch, 5/8inch, 3/4inch, 7/8inch.2. Made of high-quality metal materials, High quality to use.3. Preserve the ductility of copper/aluminum during die forging to avoid cracks and leakage.4. Suitable for hard and soft copper standardized, easy to braze swaging set.5. The forging stopper will provide a large swaging depth to achieve a perfect fit.6. When installing the air conditioner, expand the copper pipe to connect the two copper pipes with each other. (It needs to be installed on a hand drill).7. Sufficient quantity, complete specifications, perfect to complete your work needs.Specification:A full range of forging tools makes it easier to expand HVAC pipes.Features:6 piece set, with the most common HVAC pipe diameter: 1/4inch, 3/8inch, 1/2inch, 5/8inch, 3/4inch, 7/8inch.Made of high-quality metal materials, High quality to use.Preserve the ductility of copper/aluminum during die forging to avoid cracks and leakage.Suitable for hard and soft copper standardized, easy to braze swaging set.The forging stopper will provide a large swaging depth to achieve a perfect fit.When installing the air conditioner, expand the copper pipe to connect the two copper pipes with each other. (It needs to be installed on a hand drill).Sufficient quantity, complete specifications, perfect to complete your work needs.Specifications:Material: MetalPackage Weight: 150g / 5.29ouncesPackage Size: 120 * 80 * 27mm / 4.72 * 3.15 * 1.06inPacking List:6 * Tube ExpandersPackage List:6 * Tube Expanders