An accurate way to check for wear of roller and pin on chains

1% of wear is enough to affect chainrings and sprockets, and allow shifting performance to deteriorate

Just insert the chain Checker's pins into two links, press the swing arm gauge, and then check the gauge window for an accurate reading

Reads wear from 0.25% to 1%

An essential tool that our head home mechanic tutor Keith will insist you use regularly to avoid big service bills!