System, including methods and apparatus, for deforming a plate member on bone. In some embodiments, the system may comprise a plate member defining a plurality of openings to receive fasteners that attach the plate member to bone. The plate member may include a pair of undercut flanges formed by opposite edge regions of the plate member. The system also may comprise a bending tool configured to be operatively associated with the plate member after the plate member is attached to bone, with a region of the bending tool positioned under each of the undercut flanges, such that rotation of the bending tool applies a moment to the plate member.
