- Made from precision laser cut steel, now manufactured to tighter tolerances
- Measures a 50% longer section of chain than the CC-3, for more accurate results
- Indicates when a chain reaches 0.5% and 0.75% wear, which are appropriate replacement percentages for today’s precision chains and drivetrains
- Measurement markings are permanently stamped into the metal so that they can not be removed by solvents












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