Set includes sizes: 1/8" - 27 NPT, 1/4" - 18 NPT, 3/8" - 18 NPT, 1/2" - 14 NPT, 3/4" - 14 NPT, 1" - 11.5 NPT. Round shank and square end design caters to most applications in shallow cuts. Durable and harder than typical carbon steel for improved longevity.
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