A small, threaded rod with a slotted head designed to fasten skull plates (i.e., plates with a central convex curvature matching the curvature of the forehead, side, or rear areas of the human adult) to the intact cranial bones. It is typically made of metal [e.g., stainless steel, titanium (Ti)] and has a length and diameter appropriate to match the plate holes and the cranial bones. It is used mainly in neurosurgical procedures intended to fix cranioplasty plates used to repair defects created or caused by injury, surgical intervention for tumour removal, or congenital anomaly or disease.