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.[MULTI SIZE]: 7/8 inch, 3/4 inch, 5/8 inch, 1/2 inch, 3/8 inch, 1/4 inch, 6 different sizes per set of your choice to meet your needs.[FUNCTION AND EASY TO INSTALL]: When the air conditioner is installed, expand the tube, make two mutual tubes. (To be installed in manual electric drill). Perfect for installers, it doesn't matter if you are learning or have been doing it. Good performance and long life, full range of forging tools makes it easier to extend pipes.[PRECISION]: The flares will always have the same size and will fit perfectly; The swages present a perfect depth and a tight fitting, that will make the brazing easier, reducing the fatigue stress over the coupling area.[GREAT PRESSING TOOLS]: Revolutionizing system for molding tubes using heat by friction way more surface of between the flare and the Valve. A full range of forging tools makes it easy to expand HVAC tubing, the forging plug will provide a large exchange depth for a .Material:Metalcolour:blackPackage Contents:12 * Hexagonal Handle Tube ExpanderOnly the above package content, other products are not included.Note: Light 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.