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 _ 8.5 MM _ 9 MM _ 10 MM. 2x – DRIVE ROD. Not suitable for Modern / Hardened valve seats. We ensure the product reaches you at the earliest. We are looking forward to your positive reviews and to build a long term relationship.