The park tool ct63 folding chain tool now 11 speed compatible removes and installs chain pins in all derailleur chains the smooth and strong stainless steel construction allows you to easily fold out the handles to make light work of even the tightest pins with the added bonus of no chain gunk stains the tool handles completely enclose the chain cradle when folded the park tool ct63 folding chain tool is handy and small to carry around easily in your pack or jersey thanks to its39 fol