You can make clean holes in leather, cloth, rubber, paper (bookbinding), etc. Since you don't need a hammer or other hammering tools, you can make eyelet holes without worrying about noise. Since the blade rotates to make holes, it is also recommended for beginners. Comes with a 3mm * blade for basic use. There are 11 types of special * blades (sold separately): 1, 1.2, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, and 5mm .