A worn chain damages your drivetrain. The Park Tool CC-4.2 Chain Checker accurately measures wear in seconds, helping you avoid costly repairs.Key Features and Benefits:Three-point chain contact for precise measurements: The tool touches the chain in three strategic spots, ensuring reliable and consistent readings. This helps you know exactly when replacement is needed, preventing premature drivetrain wear.Measures wear on 5 to 13-speed and single-speed chains: Compatible with popular chain types like SRAM, Shimano, and Campagnolo. This versatility ensures you can use it across various bikes.Laser-cut for high accuracy: The precision laser-cut design delivers accurate measurements every time. This precision avoids guesswork and ensures your bike performs smoothly.Indicates 0.5%, 0.75%, and 1.0% wear levels: These markers align with manufacturer guidelines for replacement. You ll maximise chain life and protect other drivetrain components.Keep your bike in top condition by addressing chain wear before it causes expensive problems. The Park Tool CC-4.2 makes chain checks simple, fast, and accurate. Maintain your drivetrain the right way with the Park Tool CC-4.2 Chain Checker. Get the precision you need to keep your bike performing at its best.