Locking Device and Fracture Compression All Radius, Humerus, Femur and Tibia plates contain locking screw holes in the plate head and alternating locking and compression screw holes in the shaft. The locking screw holes will accept either conical or locking screws. Flexibility and Compatibility The Elbow and Fibula plates contain locking screw holes in the plate head and the figure-8-shaped holes in the shaft, which accommodate standard or locking screws on either side of the hole. Optimized Screw Trajectory Multiple locking holes in the plate head allow placement of the screws to capture fragments. Strut screw creates rigid fixation by using maximum screw length. Combining Anatomic Fit with Locking Technology With the Periarticular Locking Plate System, Zimmer offers advanced solutions for the management of comminuted fractures and fractures in osteopenic bone. The system combines anatomically contoured periarticular plates with locking screw technology.