You get precision-machined durability built to handle the torque and wear your chain throws at the countershaft. JT Sprockets uses computer-controlled cutting equipment and chromoly SCM420 steel alloy to deliver consistent tooth profiles and long service life. Features Chromoly SCM420 steel alloy construction resists wear and holds up to chain loads ride after ride Computer-controlled machining produces accurate tooth geometry for smooth power transfer and reduced chain friction Heat-treated and hand-finished to meet exacting quality standards for reliable performance Latest-generation manufacturing ensures each sprocket delivers maximum durability under demanding conditions