This tool has been designed and manufactured for the precise alignment of frame and fork disc brake mounts. It mills every IS mount, Post Mount, and the new Shimano Flat Mount (Front Mount and Rear Mount). It includes two pairs of disc brake mount cutters: one pair for IS mounts and one pair for Post Mount and Flat Mount. The cutters rotate simultaneously for quick and accurate milling operations. Both mounts are milled at the same time, ensuring that they are processed equally and in parallel in a single operation. The new generation of cutters allows for the machining of steel, aluminum, magnesium, and carbon surfaces.