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Compound leverage increases mechanical advantage nearly 7 to 1, all you have to do is squeeze the handles together with one hand while holding the stud in place and you can get a clean crimp every time. The unique punch and die shape creates a rectangular crimp, bending over the thickness of the channel and stud at the same time to form a sturdy bond. The crimp is always the proper strength and resists stress from any angle. The spring return handles snap the punch back in a ready position and it's ready to go on to the next stud or fastening point. The lightweight and compact size allows the user to work overhead or in tight quarters with ease.