Denco Corn Plane Blades 3910 are replacement blades designed specifically for corn planes, used in the treatment and removal of calluses and corns. These precision-crafted blades ensure safe and effective removal of hardened skin. As this is a personal care/medical product used for treating foot conditions, no additional features are listed for safety reasons. Please consult a healthcare professional for proper usage instructions and precautions when using corn plane blades.