6PCS Tap Drill Countersink Bit HSS Hex Shank Set Tool For Metal Steel Wood BU

90 degree bevel blades, 90-degree chamfer or taper round hole for a workpiece. Material: High speed steel 4241 (HSS). Shank: Round handle. Used in hardness 25 ° below the workpiece, such as carbon steel, sheet iron, insulation board, PVC board, wood, etc.

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