This year Park Tool decided to make a couple of updates to the classic CT 3. 2 Chain Tool that graced most bike shops across the country, bringing it compatibility forward with the Chain Tool - CT-3. 3. This handy shop-grade tool works on 5 to 12 speed chains, including SRAM AXS 12-speed, as well as both 1/8in and 3/16in chains. It features an adjustable locating shelf to accommodate any width chain, making it simple to remove and install rivets. Its crafted with an investment-cast steel body and a replaceable driving pin for years of use, and topped with a comfortable handle. The CT 3. 3 will install, but not peel Campagnolo 11 and 12-speed chain rivets.