VALVE SEAT TOOL KIT 12 PCS HIGH CARBON STEEL CUTTER FOR VINTAGE BLOCK HEADS. VALVE SEAT TOOL KIT 12 PCS HIGH CARBON STEEL CUTTER FOR VINTAGE BLOCK HEADS HQ Description Contents Milling in the following sizes: at 45 DEGREE + 90 DEGREE: 1.3/16″, 1.1/4″, 1.5/16″, 1.7/16″, 1.1/2″, 15/8″, 1.3/4″, 1.7/8″. At 30 DEGREE + 60 DEGREE: 1.3/4″ 8 stem guide in the following sizes: 5/16″, 3/8″, 11/32″, 7/16, 7MM, 8.5MM, 9MM, MM. 2 PCS HANDELS 1 ROD Not suitable for hardened valve seats IN WOODEN CASE.