Cheap And Discounts Carbide Drill Bit Hole 5xD with 2 Internal Coolants Holes High Quality 3mm 4mm 5mm 6mm 7mm 8mm Twist Drill Bit Water Wholesale. Buy Directly From Merchant xyjtool Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.