The Park Tool HR-11 is a simple 11 millimeter hex wrench, constructed from through-hardened industrial-quality steel with chamfered tips for a precision fit. 11 mm hex wrenches are sometimes necessary for removing the freehub bodies from several popular brands of hubs (Mavic®, Sun Race®, Sovos™, and others). Also sometimes used for thru axle hub service.

• 11 mm hex wrench