A sterile, non-metallic, non-bioabsorbable device designed to be partially implanted around the perimeter of a replaced cranial bone flap after a craniotomy to ensure structural stability during the healing period. It is typically made of biocompatible plastic materials [e.g., polyoxymethylene (POM), commonly known as Delrin] and is typically designed with internal and external flanges that are tensioned together over the bone of both the flap and skull and locked via a central stem. It may also be used for craniofacial bone fracture fixation. Its non-metallic design makes it more compatible with radiological imaging than metallic clips.