This picture depicts a general cold saw and thus may look different from each particular item. Pin Holes : 2/8/55 + 4/12/64 ( 2.0mm Thickness )2/8/55 + 2/12/62 + 4/12/64 ( 2.5mm Thickness ) This M2 HSS cold saw blade comes with universal pin holes, TCG ( Triple Chip Grind - AKA Tooth Pattern C), and a tooth pattern which is specially designed for cutting common soild materials made of cast iron or mild steel.