You get a self-cleaning sprocket that sheds dirt and mud from the contact area while running lighter than traditional steel designs. JT&';s SC sprocket uses heat-induction hardened C45 steel that lasts up to six times longer than 7075 aluminum and extends chain life. Features Self-cleaning design keeps the contact area clear of dirt and mud during aggressive riding Heat-induction hardened C45 steel delivers durability that outlasts aluminum sprockets by up to six times Weight-reduced profile cuts mass without compromising strength Black zinc finish provides corrosion resistance and a clean appearance Extended chain life from the hardened steel surface that reduces wear on your chain