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Generic Tungsten Steel 0.9mm Carbide PCB Drill Bits CNC/PCB Milling Machine Pack of 10: Industrial & Scientific. Buy Generic Tungsten Steel 0.9mm Carbide PCB Drill Bits CNC/PCB Milling Machine Pack of 10: Circuit Board Drill Bits - ✓ FREE DELIVERY possible on eligible purchases. A set of 0.9mm Drill Bits 。 PCB Drill Bits 0.9mm 。 1.These long-lasting bits are made from high quality tungsten steel for a precise,easy experience 2.These carbide PCB drill design for CNC/PCB Milling Machine,and diminished drill flux. Mainly applies to copper, aluminum,fiberglass,carbon,circuit board,wood and most plastic including acrylic 3.Specifically designed for trace isolation patterns cutting on circuit boards,these PCB drill will give a clean burr free cut 4.Please note,These bits are Very Sharp and lightly used and Each Piece has Been Cleaned 5.Constructed of Industrial Grade Solid Tungsten Carbide 6.Tungsten steel blade,welded iron body 7.Cutting edge symmetry, is conducive to the efficient cutting, avoid drilling offset Specification: Cutting Edge Diameter: Approx.0.9mm Shank Diameter: Approx.3.175mm Overall Length: Approx. 38.22mm Package Included: A set of 0.9mm Carbide PCB drill bits(10pcs)。