Features:* .* , .* Sturdy and easy to use, good assistant for work and life.* Easy to use, good performance and long service life * A full range of forging tools make it easy to expand HVAC pipes.* Keep copper/aluminum ductile during die forging to avoid cracks and leakage.* 5 type size for your choice: with the most popular HVAC pipe diameter: 1/4 inch 3/8 inch 1/2 inch 5/8 inch 3/4 inch * Suitable for hard and soft copper standardized, easy to solder swaging kit.* The forging plug will provide a large shaping depth to achieve a perfect fit.* When installing the air conditioner, unwrap the copper pipe to make the two copper pipe together. (Must be installed on a hand drill) * Sufficient quantity, complete specifications, perfect to meet your work needsSpecifications:* Material: Bearing Steel, Blackened Surface Treatment * Color: Black * Size: 3/4 inch (19mm), 5/8 inch (15.9mm), 1/2 inch (12.7mm), 3/8 inch (9.5mm), 1/4 inch (6.3mm) * Shank Model: 6.35mm Hex Chuck * Optional Quantity: 5pcs/1pcsPackage Contents:Package 1:5 * Tube ExpanderPackage 2:1 * Tube ExpanderNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.