This Irwin 10502500 HSS Pro is an industrial quality 19-piece twist drill bit set with outstanding performance and long service life. Set of 19 HSS Pro Drill Bits 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9.
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