Unior 1647/2ABI-US Pro Chain Tool Description: The 1647/2ABI-US Pro Chain Tool is a rugged shop quality chain tool. This tool has a one-piece chassis machined out of hardened high carbon steel that is rugged and stiff, and features an ergonomic handle for more leverage and comfort. The tools replaceable pin is backed by a ball bearing which helps this pin to align better to the chain, which makes it much easier push chain pins out with minimal binding. Finally, the shaft handle is dipped for added grip and features enough length to work loose the stiffest of chain links. Features: One piece hardened and tempered carbon steel construction in the chassis will hold up to years of use and abuse Replaceable tool pin is backed by a ball bearing to help ensure the pin drives the chain pin straight out, reducing binding and lengthening the life of the tool pin Has a separate shelf to help work loose stuck chain pins Works on 5 to 12-speed bicycle chains including SRAM and Shimano 12 speed, as well as 11 speed Campagnolo chains Not compatible with SRAM Flattop chains or certain single speed chains (works with 3/32" and 1/8". Will not work with 3/16")