Park tool folding chain tool ct 6 3now 11 speed compatible the ct 6 smooth and powerful this handy take along is encased ina stainless steel shell which becomes acomfortable handlewhen opened also includedis a peening anvil that allows forpeening of campagnolo11 speed chains which pivots out of the way when not in use features cast steel body with stainless steel case replaceable pin part 985 1 works on 5 to 11 speed derailleur chains foldable peening anvil dimensions 28 x 0