Thorpe Calipers from Hayden Medical are graduated in increments from 0 to 80 millimeters and 0 to 3 inches. These surgical calipers are designed with an angled tip and a locking mechanism to secure the caliper while operating.
The McKissock (Collyer) Caliper is designed with an adjustable ruler for exact measurements in plastic surgery operations. These surgical calipers are made with German stainless steel for durability and are autoclavable.