Product features:

• The perfect tool to keep your bike's drivetrain in top condition.
• Staying on top of chain wear is important, as a worn chain can cause poor shifting and wear out other drivetrain components.
• Made from precision, laser-cut steel.
• Accurately measures 0.5% and 0.75% chain wear levels – wear at which chain manufacturers typically recommend chain replacement.
• The three-point tool design isolates pin wear from roller wear.
• Works on 6-13 speed chains, including Sram flat top chains.
• General rule for chain replacement:
• 11 – 13 speed chains – replace at or before 0.5% wear.
• 6 – 10 speed chains – replace at or before 0.75% wear.