The new clean design Nihilo Concepts Factory Chain adjuster blocks are designed after the factory adjusters. Nihilo went one step further, making the trick billet adjuster blocks lightweight and super-strong. Don't take the chance of a chain derailing because of faulty adjuster blocks change yours out today! The new billet chain adjuster blocks are stronger than the stock units because they are precision machined from 6061 billet aluminum in Nihilo Concepts' Florida manufacturing facility. The Nihilo Concepts adjusters are legal in the Stock class in all AMA and NMA events and is a must have for the serious racer. You need to try these Factory adjusters to see for yourself just how tricky they are. Note: Actual anodized color may vary from image. Detailed Specifications: