Abstract: A gravel grading attachment assembly prepares gravel subgrade to a form prior to concrete placement. The assembly includes a main blade coupled to an attachment member to provide a straight bottom edge. First and second roller assemblies are coupled to and extend from the main blade. Each of a first roller and a second roller rotate in a plane substantially transverse to the straight bottom edge of the main blade. The first roller and the second roller rest upon spaced guide surfaces and the main blade is maintained at a consistent spacing relative to the guide surfaces as the first and second rollers are moved on the guide surfaces.