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Delevel Straight Shank CNC Bit Twist Carbide Deep Hole Drill for Metal Drilling. Substrate: solid tungsten carbide, ground on CNC tool grinders with in-process measurement. Tolerance: h6 shank tolerance as standard. Coating: AlTiN, AlCr-based and TiSiN available, selected by workpiece material. Workpiece Materials: carbon steel, alloy steel, stainless steel, cast iron and hardened materials. Customization: non-standard internal coolant drills produced to drawing, minimum order quantity 5 pieces. Lead Time: samples within 7 to 15 working days, volume production within 30 days.