Review on Efficiently Remove Chainring Nuts with Park Tool CNW-2 Chainring Nut Wrench by Jeff Perez

This tool is suitable for removing standard chain pins. The problem is the bolt design is terrible. One screw is for the hex wrench, and the matching inner screw is what you need this tool for. The inner bolt has 2 small, shallow grooves that this tool goes into. It's like the bolt is designed so any tool can slip out and send your fingers into the ring of the chain to grind. My recommendation is to take this tool to remove your screws. and replace them with double ended hex screws like Wolf Tooth Components = 1621349554&sr=8-6&th=1).