Shimnao TL-CN42 Chain Wear Indicator

Shimano Shimnao TL-CN42 Chain Wear Indicator
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Details / Shimnao TL-CN42 Chain Wear Indicator
Shimano's TL-CN42 can measure any 1/2" pitch chains in either 1/8", 3/32" or 11/128" flavors.
Laser cut precision steel construction that translates into the CN42 being the last chain checker you ever need.