The tight tolerances of modern bicycle disc brake systems require precise alignment of all components for optimal performance, yet brake mounts on many frames and forks are often misaligned. The Park Tool DT-5.2 is a precision tool system designed to accurately face disc brake mounts so they are perfectly aligned with the rotor. The DT-5.2 works on any IS, post mount, or flat mount, including tight clearance chainstay mounts. Included thru-axle adapters allow use with any open or closed dropout configuration and dropout widths (including Boost 110, Boost 148, and all fat bike axles). A professional solution for an essential frame preparation procedure.