Abstract: A musculoskeletal instrument with a plurality of fluid relief channels is provided. The instrument includes a substantially flat body that has an outer rim. The outer rim forms a first concave portion and a second concave portion. The first concave portion includes a greater radius of curvature than the second concave portion. Therefore, the present invention may be used for different treatment areas. Each of the first concave portion and the second concave portion include a plurality of teeth formed on the outer rim by a plurality of channels. The plurality of teeth and the substantially flat body are planar.