Castroviejo Caliper (8.5cm, 16.5cm) used for precise measurements during ophthalmic and orthopedic surgical procedures. In addition to that. it has fine, graduated arms and a smooth-sliding thumb screw mechanism, allowing for high-precision measurements in constrained surgical fields. It comes with straight or curved shafts available to meet specific procedural requirements. https://grey-medical.com/product/castroviejo-calipers.html