Cheap And Discounts BB Solid Carbide Micro Drill Mini Uncoated Bit Aluminum Hole Drilling 3xD Cutting 4mm Shank CNC Tool 2.03-3.75mm Wholesale. Buy Directly From Merchant BB Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.