This picture depicts a general cold saw and thus may look different from each particular item. Pin Holes : 2/8/45 + 2/9/50 + 2/11/63 This M2 HSS cold saw blade comes with universal pin holes, ATB ( Alternate Top Bevel Grind - AKA Tooth Pattern BW), and a tooth pattern which is specially designed for cutting common thin wall pipes, tubes made of cast iron and mild steel.