Checking your chain for wear is one of the simplest things any cyclist can do to maintain drivetrain performance and minimize maintenance costs. The Pedro's Chain Checker Plus II makes this task quick and easy offering a simple check of 50% and 75% chain wear. To ensure the maximum life from your chain and accuracy of measurement, the tool employs a three-point design which properly isolates pin wear from roller wear. Other two-point designs do not and can incorrectly indicate a worn chain, robbing the user of additional miles and money. The Chain Checker Plus II also includes a chain hook tool, perfect for simplifying chain removal and installation, and a chainring nut wrench, essential for removal and installation of chainrings. - Three point chain wear tool design properly isolates pin wear from roller wear - Includes a chain hook tool for simplifying chain removal and installation, and a chainring nut wrench for removal and installation of chainrings - Two chain wear indicators: 50% and 75% - Improved user instructions are laser etched on the tool