Humby Dermatome Skin Graft Knife allows for precise, consistent harvesting of split-thickness grafts with minimal trauma to the donor site. This knife's blade is intended to cut through skin smoothly. It has a side-to-side oscillating roller bar with grooves. It features an adjustable nut at the end of the knife that allows you to move the roller bar up or down to alter the thickness ... https://new-medinstruments.com/humby-dermatome-skin-graft-knife.html