Every Driven Sprocket is manufactured to a rigorous standard of quality which is unsurpassed in the industry. One of the lightest 520 steel sprockets available today. Designed using Driven Racing's proprietary EST Technology. Driven steel sprockets are manufactured using only the highest quality 45C steel available. Steel sprockets are heat treated and then quenched for maximum strength and durability. The dynamic electro-static plating process finishes the sprocket to give it the unique driven evo-spec look. Every sprocket is guaranteed against defects in materials and workmanship; performance and reliability in one sprocket. Lowered surface to remove unnecessary weight. All Driven rear sprockets are drilled to reduce overall weight. The sprockets come in 520 pitch to cover most sport bikes and aftermarket wheel sets on the market today.