Material: Made of bearing steel. It has a high and uniform hardness and wear resistance and a high elastic limit, durable and easy to use, your good assistant for work and life.Size: 5 pieces of mouth expander, handle diameter: 1/4 inch (6.35mm) hexagonal handle specifications: 3/4 inch (19mm), 5/8 inch (15.9mm), 1/2 inch (12.7mm), 3/8 inch (9.5mm), 1/4 inch (6.3mm); 6 pieces of expander: 7/8 inch (22.2mm), 3/4 inch (19mm), 5/8 inch (15.9mm), 1/2 inch (12.7mm), 3/ 8 inch (9.5mm), 1/4 inch (6.3mm)Easy to Use: Perfect for installers, no matter if you are just learning or doing it. Good performance and , full range of forging tools makes it easier to extend pipes.Great Pressing Tools: Revolutionizing system for molding tubes using heat by friction way more surface of between the and the Valv e.The flares will always have the same size and will fit perfectly; The swages a perfect depth and a tight fitting, that will make the brazing easier, reducing the fatigue stress over the coupling area.Multi-Function: Preserving the ductility of copper/aluminum during die forging to avoid cracks and leakage. When air conditioning is installed, expand copper tube, make two copper tube link. (To be installed on hand electric drill.)Colour:blackMaterial:steelPackage Contents:11 * Copper Pipe Swaging Tool Drill Bits