VALVE SEAT TOOL KIT. HIGH CARBON STEEL CUTTER. VINTAGE BLOCK HEADS HQ. Milling in the following sizes. At 45 DEGREE + 90 DEGREE. At 30 DEGREE + 60 DEGREE. SEAT BORE CUTTERS 70. 8 stem guide in the following sizes. 5/16″, 3/8″, 11/32″, 7/16″. 7 MM, 8 MM, 9 MM, 10 MM. 2 Pcs DRIVE ROD. Not suitable for Modern / Hardened valve seats. NOW IN VINTAGE STYLE METAL CASE.