Bone plates for small bones, Hand surgery - Foot surgery The patented plate-screw-locking system allows for a multi-axial screwing into the bone with fixed-angle fixation of screw and plate. The functioning is based on a plastical forming between head thread of the screw and the artrisks of the plate hole while screwing. Repeated use of the locking, that is, screwing in and out, several times, is possible.