NOTE: The old model DOES NOT COME WITH Pipe Knife and Chamfering Tool!!!（The yellow plastic box is the old model, and the black plastic box is the new model） 【Hydraulic Power Driven System 】Different with similar hand tool that relies on leverage and hand power, our hydraulic copper tube fittings crimping tool is designed with hydraulic cylinder which is labor-saving. One person is totally enough to finish leak-free connections. 【Changeable Crimping Jaws 1/2", 3/4", 1"】 With a ball bearing springs inside the head, just simply slide in and out to change the crimping dies of different size to meet your various demand and make it the fastest solution for pipe maintenance and repair. 【360° Rotating Head】The rotating head makes the copper plumbing easier in some locations especially for Tee fittings. Note : When connecting Tee fittings, the middle connection should be done first or second. 【Reliable and Faster than Soldering 】No brazing, no soldering. It takes only a few pumps to get the fitting compressed in seconds. Anti-slide and ergonomic grip makes the crimper comfortable when sealing pipe fittings. 【Wide application】 Compatible with Viega Copper, Elkhart, Conex Pipe Fittings.