Replacement blade for 90 25 20, 90 10 185, and 90 25 185. Designed for cutting composite pipes with a diameter of 12.0 to 25.0 mm and flexible protective hoses with a diameter of 18.0 to 35.0 mm, without damaging the potential interior of the pipe. A calibration pin can be mounted, for example, for Geberit composite pipes with diameters of 11.5 and 15.0 mm. The capacity options include semicircle, square millimeter, square drive, step square, triangular, and various spans for hexagonal, round, and square shapes.