7Pcs/set Counterbore End Mill Slot Drill Bit M3-M12 Pilot Slotting Tool HSS

Type: M3.2 (3.2 5.9mm), M4.2 (4.2 7.4mm), M5.2 (5.2 8.9mm), M6.2 (6.2x10.4mm), M8.2 (8.2x13.4mm), M10.3 (10.3x16.8mm), M12.4 (12.4x18.8mm). 7pc x Mill Cutter. Can milling of copper, aluminum, tool steel, cast iron, etc.

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