• 72 teeth/5° action angle • Quick release function for easy and safe operation • With non-slip metal disc change system • Made of high performance alloy steel, precision forged and heat treated to provide optimum durability • Finish: matte chrome plated • 9550N/A plus 9550N/B = 9550N • Spare parts available • Standards: ISO 3315 / DIN 3122 / ISO 1174-2 / DIN 3120