The COMBICLICK® system consists of a specially developed backing pad and a rugged mounting system at the back of the disc. The backing pad allows COMBICLICK® discs to be used on most available angle grinders. The special geometry of the cooling slots ensures high air throughput, which considerably reduces the thermal load on the abrasive material and the workpiece. The quick-mounting system, rugged fixture, secure attachment of the disc and optimized cooling system help to provide up to 30% lower workpiece temperature, up to 25% increased stock removal, up to 30% longer disc life and improved utilization of the abrasive. PFERD fibre discs are manufactured in accordance with ISO 16057 in shape A1 version F under the designation "vulcanized fibre disc". For maximum aggressive grinding with an extremely long tool life and an outstanding stock removal rate on steel and hard materials. Outstanding, constant high performance due to the VICTOGRAIN abrasive grain. Each VICTOGRAIN abrasive grain triangle is firmly fixed on one of its sides to the backing material. Due to the slim design, VICTOGRAIN offers an extremely large chip space for maximum cutting efficiency. The structure of the triangular VICTOGRAIN is specially engineered to maximize results. The very fine crystalline structure ensures optimal wear characteristics as sharp cutting edges are always exposed, with the minimum amount of abrasive breaking off from the triangle. By combining all these properties together, users benefit from optimal, consistent performance, cool grinding and an extremely long service life with uniform workpiece surface roughness.