Cobalt Metric Drill bits Set 1.5mm-6.5mm/13PCS for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic

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• 【Cobalt drill bits Widely applicable】Cobalt drill bits for by are suitable for stainless steel, carbon, steel, cast iron, engineering steel, hard metals, copper, wood suitable for home handicraft scenes and professional work
• 【Rare element cobalt】Metal drill bits with 5% cobalt element improve hardness, high temperature resistance, durability and performance better than conventional drill bits Note that it does not apply with glass and ceramics
• 【Good Performance】135% Spiral Double Edge Cutting Sharp Corners Do Not Linger on the Surface, but Advance in a Predetermined Direction
• 【Metric drill bits set】 1.5mm 2mm 2.5mm 3mm 3.2mm 3.5mm 4mm 4.5mm 4.8mm 5mm 5.5mm 6mm 6.5mm A total of 13 round straight steel drills of different diameters, suitable for home handicraft scenes and professional work Small sizes require attention to speed and temperature
• 【Plastic Storage Box】A storage box with size identification, which is easy to carry, choose and store