40 blades, hundreds of uses! From cutting paper, plastic, cardboard and light woods to carving, chiseling, gouging, grooving and more, this Multipurpose Hobby Blade Assortment does it all. Includes eight no. 11 blades, four each nos. 7, 10, 12 and 17 blades (use with no. 1 knife handle, sold separately), and four each nos. 2, 19, 20 and 21 blades (use with nos. 2, 5 or 6 handles, sold separately).