ESJOT gear designed specifically for high OEM requirements and among the best sprockets in the world on the market. A special steel, a high quality hardening and precise gear ensure extremely high strength and durability - ideal for high wear conditions in all areas - Steel 16 MNCR 5 - Machined on CNC lathes - Hardening of 700 HV 40 for a depth 0.4 mm diameter - Modern broaching ensures an exact shape size on the crankshaft - Radial and axial runout tolerance less than 0.1 mm - 100% Made in Germany - OEM quality