The blade is a tool to eliminate the outer bead that occurs in butt welds of plastic pipes. In the case of this blade, it is used for pipes from 90 to 400mm.
The operation is very simple, it has a blade that is inserted into the outer cord and, using alignment elements, slides along the surface of the pipe, eliminating the cord without damaging the pipe. It has a handle that helps hold and pull the tool around the pipe.
