Humby knife is a surgical instrument used for taking split-thickness skin grafts during plastic, burn, and reconstructive surgeries. It is also called a Humby dermatome. Main features Adjustable roller to control graft thickness Replaceable sharp blade Stainless steel instrument Used manually by the surgeon Uses Burn wound coverage Skin grafting procedures Reconstructive and plastic surgery Large raw wound management Important point The adjustable roller helps remove a uniform thin layer of skin