This invention is aimed at the cutting of various materials, especially fabrics and leathers, according to block patterns. By the simple use of cutting edges of steel band reinforced with structural frame, materials placed on the base board of a hydraulic press can be cut along a required profile by lowering the platen of the hydraulic press to a determined level in the exact position desired. Then, with the final dropping of a hammer head onto the top platen of the hydraulic press, complete cutting is achieved with high precision and a savings of labour.