Abstract: Apparatus and method for compression and realignment of animal bone structures and passage of a drill pin therethrough to retain them in a desired alignment. The apparatus comprises a rigid U-shaped jig having a threaded aperture adjacent the end of one leg and an unthreaded aperture adjacent the end of the other leg thereof, the apertures being axially aligned; a threaded adjustment screw engaged in the threaded aperture and movable toward the other leg upon rotation; a cylindrical bushing slidably engaged in the unthreaded aperture having a threaded axial passage therethrough; means for clamping the bushing in a desired position of adjustment; a threaded drill pin engaged in the passage in the bushing and movable toward the one leg upon rotation; and means for rotating the drill pin thereby piercing and traversing the bone structures and holding them in a desired position of alignment. Correction of splay foot deformity and other surgery of the human foot, hand and knee can thus be effected.