Cheap And Discounts BB Twist Drill Bit 1/2 Inch HSS M2 M35 Cobalt Metal Steel Hole Making Tool CNC Drilling 12mm Shank 12~35mm Wholesale. Buy Directly From Merchant BB Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.