Quickly change out dull blades with these 3.5-inch, 420 stainless steel replacement blades made to fit the Replaceable Blade RAZOR KNIFE. Just use the quick release lever on the black oxide coated blade holder to release the dull blade and to replace with the sharper replacement blade; press the release lever down to lock the blade in place. Made with functionality and style in mind and engineered to provide superior cutting power, the Replaceable Blade RAZOR KNIFE is a great knife for camping, hiking, and everyday carry. Comes in a package of 6 replacement blades.