The MotoSport.com Dirt Tricks Chain and Zirconium Sprocket Kit includes ONE Dirt Tricks Front Sprocket, ONE Dirt Tricks Zirconium Rear Sprocket, and your choice of ONE Premium Drive Chain, each with the following features: Sprockets / Chainwheels Included: Dirt Tricks Front Sprocket: If you wear out your sprockets, Dirt Tricks has the solution! What makes their sprocket so superior to anything sold? One-year warranty. Made from high-grade, shock-resistant tool steel. Machined to the tightest industry standards. Special "through" hardening process for the ultimate toughness and longevity. Made in the U.S.A.! Dirt Tricks Zirconium Rear Sprocket: The Dirt Tricks Beta Zirconium Rear Sprocket is part of the next revolutionary change in weight and color!