A base having a substantially planar surface, a plurality of upright fingers, and a blade guide that can be adjustably positioned along the planar surface. The blade guide can be biased toward the upright fingers to secure a section of donor bone between the blade guide and the upright fingers. Aligned openings in the blade guide and planar surface, as well as the gaps between the upright fingers, permit precision cutting of a donor bone section to prepare a graft having a desired size and/or configuration.
