Dyna International’s 2.4mm Distal Radius T Plates 4 Holes & 12mm-20mm LCP Locking Screws 54 Pcs Set is a type of orthopedic plate used in the fixation of fractures or other orthopedic conditions in the distal (lower) part of the radius bone in the forearm. The “2.4mm” refers to the thickness of the plate, indicating the size of screws that can be used with it. Locking Screws describes a set of locking screws used with a specific type of plate. “LCP” stands for Locking Compression Plate, suggesting that these screws are designed to be used with plates that allow for locking fixation.