Park Tool CC-3.2 Chain Checker/Chain Wear Indicator
Park Tool CC-3.2 Chain Checker/Chain Wear Indicator, Designed to accurately indicate when a chain reaches .5% and .75% which most chain manufactures recommend replacement. Chain wear indicator is a simple go or no go tool.Updated to be longer, more accurate and features permanent measurement markingsAccurately indicates when a chain reaches 0.5% and 0.75%, the points at which most chain manufacturers suggest replacement