VALVE SEAT TOOL KIT HIGH CARBON STEEL CUTTER. Not suitable for Modern / Hardened valve seats. SEAT BORE CUTTERS - 20 DEGREE. at 45 DEGREE + 90 DEGREE 5/16",3/8",11/32",7/16". 1-1/2" - 20 DEGREE. 1-1/4" - 20 DEGREE.
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