Super sharp classic #21 hobby blades 100% Made in the USA with stainless steel straight edge perfect for trimming and scoring wood plastic paper leather and more with ultimate precision. These versatile replacement blades fit with all standard light to medium duty craft knives including Xacto Knife. They are perfect for graphic artists designers and arts and crafts applications wood carving scrapbooking model kits paper crafts and more. Includes a pack of (5) stainless steel #21 hobby blades with a 1.56 x 0.25 x 1.0 inch edge.