The MotoSport.com Vortex 530 F5 Sprocket And Chain Kit includes ONE Steel Countershaft (Front) Sprocket, ONE F5 Rear Sprocket, and your choice of ONE Premium 530 Drive Chain, each with the following features: Sprockets / Chainwheels Included: Vortex Front Steel Sprocket: Made of the highest quality steel. Case hardened. Drilled lightening holes on most applications. Vortex F5 Rear Sprocket: Lightweight F5 aluminum racing sprocket. 100% CNC manufactured in the U.S.A. Specially formulated alloy per Vortex specifications. PTFE black hardcoat - increases wear resistance. Unique tooth design increases sprocket longevity.