Park ct63c folding chain tool with peening anvil parks neatest and most compact chain tool perfect for mountain road or commuting use works with 5 11 speed chains and thanks to its fold out peening anvil this is one of the only portable chain tools that can re join a campagnolo 11 speed chain sturdy stainless steel construction and fold out handles make light work of even the tightest pins the handles completely enclose the chain cradle when folded so no more chain gunk stains on