Center Countersink Drill Bit Set, TiAlN CoatingCobalt HSS.Co Centering Drill Bit for Stainless Steel, Carbon Steel, Alloy Steel, Cast Iron, Copper, Other Hard Metals, Metric 1-5mm (5pcs)

Better chip removal~Wide spiral arc grooves for better chip removal and heat dissipation, preventing the risk of breakage due to poor chip removal.Please use a slightly faster rotation speed，If the spinning speed is too slow, you'll think it's not sharp enough.
Better durability~Cobalt-containing high-speed steel（HSS.Co）Plus surface TIALN coating,make our center drills more robust and wear resistant.Curved root greatly reduces the risk of breakage.
Higher precision~5-axis machining center process ensures accurate and efficient drilling of center drill holes
Five common specifications~Includes 5pcs centering drill bits with 5 most commonly-used sizes, 1.0mm(*2), 2.0mm, 3.0mm, 4.0mm, 5.0mm. These lathe bits can be used for processing materials with diameters of 3/16''(5mm)~5"(130mm).
Plastic Box Set~This drill bit set comes with a portable plastic case for easy storage and organization.

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