
Tungsten Steel Rainbow Flat Bottom Drill Bit for Precise Aluminum Machining. Versatile Drilling Capabilities: Suitable for curved surfaces, inclined surfaces, countersunk holes, cross holes, semicircular holes, and thin plates. No Fixed Point Required: Can drill and expand holes without requiring fixed points on any workpiece surface. Seven-Color Coating: Features a distinctive seven-color coating for enhanced performance and visibility. Solid Carbide Material: Made from solid tungsten steel carbide for superior durability and precision. OEM and ODM Services: Offers full customization, minor customization, and flexible customization from samples or designs. 100% Quality Inspection: Every finished product undergoes visual and functional inspection before packing. Fast Lead Time: Peak and off-peak season lead times are both within 15 workdays. Low Minimum Order: Accepts orders starting from just 1 piece.