Market taxonomy for types separates skull clamps into three mechanical classes that map directly to reimbursement codes and hospital purchasing behaviour. Pin-based systems, 59 % share, rely on three or four carbon-tipped screws to pierce the outer table; they deliver the lowest micro-motion (<50 ยตm) and are preferred for long intracranial cases, yet pin-site infection risk sustains a replacement cycle of 4โ5 years. Pinless systems, 27 %, use cranial pads with dynamic tensioning; adoption is highest in paediatric and geriatric cohorts where bone thickness is marginal, but average selling price is 20 % lower, compressing manufacturer margins. Hybrid frames, 14 %, combine retractable pins with vacuum-assisted pads; they target intra-operative imaging suites where carbon-fibre radiolucency offsets a 30 % price premium. Across all sub-types, regulatory emphasis on MR-conditional materials is shifting alloy selection from aluminium to glass-fibre-reinforced PEEK, influencing bill-of-material costs and supplier negotiations.