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Heat treated tool steel countersinks with a HSS drill.-Adjustable for different length screws and can produce a 9.5mm (3/8 inch) diameter or 12.7 m...

The IRWIN® HSS Pro Combination Drilling Set is supplied in a compact carry case and contains the following: 6 x HSS Cobalt Drill Bits: 2, 3, 3.5, 4...