PRACTICAL: Maintains the ductility of copper pipe during the expansion process to prevent cracks and leaks. APPLICATION: Designed for expanding copper pipes to ensure a secure connection between pipes during air conditioning installation. MATERIAL: Made of bearing steel with high yield strength and contact fatigue resistance, resistant to breaking and deformation after long-term use. HEXAGONAL HANDLE DESIGN: Provides a secure fit on hand tools, reducing the risk of slipping and enhancing operational safety. SIZES: Includes 6 different expanders suitable for various diameters of air conditioning copper pipes. SPECIFICATIONS: 7/8 inch (22.2 mm), 3/4 inch (19 mm), 5/8 inch (15.9 mm), 1/2 inch (12.7 mm), 3/8 inch (9.5 mm), 1/4 inch (6.3 mm). PACKAGE LIST: 6 x Tube Expanders