With the Park Tool CT 6. 3 Folding Chain Tool at the ready, you're able to take the bite out of road or trailside repairs. It's low profile in the folded position, so it takes up very little space. Additionally, it's compatible with modern 11 speed chains including Campagnolo. This is made possible with the peening anvil that pivots out of the way when you're not servicing a Campy chain. And for durability, you'll find that the stainless steel handle becomes a protective shell when folded down. The Park Tool Folding Chain Tool is compatible with all 5 to 11 speed chains.