Made of high-quality bearing steel, it is , heat-, wear-, not easy to break, and is safe and secure to use. Specifications: 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) The ductility of the copper is maintained during the molding process to achieve a sealed fitting. Fits 1/4inch hex shank. Work efficiently and make your daily work more convenient. A complete range of forging tools allows air conditioners to be installed, open copper pipes, and connect two copper pipes to each other. Note:The actual color is slightly different, which does not affect use. Colour:Wine Red Material:steel Package Contents: 6 * Copper Pipe Swaging Tool Drill Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.