The MotoSport.com JT Steel Chain And Sprocket Kit includes ONE Steel Countershaft (Front) Sprocket, ONE Steel Rear Sprocket, and your choice of ONE Premium Drive Chain, each with the following features: Sprockets / Chainwheels Included: JT Sprockets is the world's leading manufacturer of aftermarket sprockets, constantly raising the industry's standards for quality and service. They are committed to supplying the most durable, best quality sprocket available in the marketplace worldwide. This is why they produce and sell more sprockets than all the other aftermarket brands combined. JT Front & Rear Sprocket: Made from the latest generation of computer design and control metal cutting equipment for maximum durability. Rear sprockets are made from the finest C45 high-carbon steel. Front sprockets are made from chromoly SCM420 steel alloy.