Shop quality chain breaker designed for use with 9/10 speed chains. Forged steel body is CNC-machined for tool accuracy and contoured for improved ergonomics. Replaceable breaker pin is made of hardened steel; spare pin included. 2x Mavic splined and 2x square spoke wrenches are integrated into the body making this an extremely compact and versatile tool.Shop Quality ToolQuality materials & contoured design make this tool suitable for the shop and home.9/10 Speed CompatibleReplaceable breaker pin is designed for 9/10 speed chain pins. Spare pin included.Versatile Tool2x Mavic splined & 2x square spoke wrenches built into the chromoly steel body..Wrench : Mavic Splined Road & MTB, 3.22,3.45Weight : 93g.