Made from quality stainless steel, this chisel has a unique flat handle that provides a solid grip with every punch. Ideal for lightweight leather and fine threads, they are your best choice for producing fine hand stitching. Stainless Steel. Measurements are stitch size. Seven stitches per inch. Available in 1 prong, 2 prongs, 4 prongs and 8 prongs. 1226 Premium Linen Thread and 1192 Harness Needles recommended.