PRACTICAL Maintain the ductility of copper pipe during the expansion process to prevent cracks and leaks. APPLICATION Mainly used to expand copper pipes, to make two pipes tightly connected when installing air conditioning. MATERIALMade of bearing steel, with high yield strength and contact fatigue resistance, not easy to deform after long-term use. HEXAGONAL HANDLE DESIGN It is not easy to fall off when installed on a hand tool, and the operation is safer. FITSThere are total 6 different sizes of expanders, suitable for expanding different diameters of air conditioning copper pipes. Specification: 7/8 inch (about 22.2mm /0.9 inch), 3/4 inch (approx. 19 mm/0.75 inch), 5/8 inch (approx. 15.9 mm/0.6 inch), 1/2 inch (approx. 12.7 mm/ 0.5 inch) inch), 3/8 inch ounces (approx. 9.5mm/0.4in), 1/4in (approx. 6.3mm/0.25in) Package List:6 x Tube Expanders