The special jaw design with opposing off-set teeth ensures maximum grip and perfect alignment. In addition the Cobra offers a unique adjustment mechanism: at the push of a button the tool adjusts fast and easily to the workpiece. No more guessing at the right size. To the contrary: place the upper part of the jaw against the workpiece, press button and push the lower jaw into position. Simply perfect. The button serves as a memory button: an unintentional adjustment - even under load - is not possible. The fine adjustment always provides a favorable position of the handles. Also in this respect the ergonomically designed Cobra is particularly user friendly.