Dont start the season without them. People who shrink wrap know and appreciate the benefits of the Dr. Shrink large shrink wrap knife. They also understand that a sharp knife works better and produces a better job. Keep you large shrink wrap knife sharp by replacing the blade. These 10 packs include blades specifically designed to fit the Dr. Shrink knife. Key Features Replacement blades for Dr. Shrink large shrink wrap knives Improves efficiency and quality of cutting shrink wrap material and strapping Sold in packs of 10