Dyna International’s 2.4mm Cortical Bone Screws 130 PCs SS Self-Tapping Orthopedic Screws in this set have a diameter of 2.4 millimeters. The size of the screw is an important factor in orthopedic surgery, and the choice depends on factors such as the type of bone, the specific anatomical location, and the nature of the orthopedic procedure. The set includes 130 pieces of 2.4mm cortical bone screws. The quantity can vary based on surgical requirements, and having an adequate number of screws is important to address the needs of the specific orthopedic procedure.