By far the most innovative little tool to ever exist, Runwell's KUROKO is a special tool for making easy work of installing and removing chainring bolts.

To use, secure the back of the bolt with two claws and a 6mm hex wrench and tighten the bolt with a 5mm hex wrench from the front. Then, throw all of your other chainring bolt tools in the trash.

ⓘ KUROKO was developed with reference to bolts attached to NJS certified parts. Some other chainring bolts may have bolt grooves that are shallow and may lack stability during use.