Our Black-Ops. Race-Only line of components are designed for the professional racer or serious amateur. They are machined from the highest quality materials available with the main focus to reduce the weight of a part to the bare minimum or be manufactured from the highest strength material possible. These parts carry only a warranty against manufacturing defects. Black-Ops. Race-Only Complete Clutch Baskets are machined from a solid piece of aerospace grade 7075 Aluminum. This means the sprocket teeth are machined right into the basket. You can save an enormous amount of weight from not having to bolt on a steel sprocket. After Machining they are Mil-spec hard anodized for protection from clutch wear. Only the ring gear is made from steel making this basket extremely light weight. Available in 49 tooth configuration only and they Include the necessary primary chain.