Change to easily ability to open suitale dovetails according to the pipe and tube diameters with the help of processing drum. Ability to tighten and loosen the parts quickly as a result of moving Clamp. Ability of clamp to move right and left sideways. With movable clamp, notching up to 50 degrees angle. Ø19, Ø21, Ø25, Ø32, Ø38, Ø42, Ø48, Ø52, Ø60, Ø76 size dovetails.