Cheap And Discounts BEYOND WC U Drilling 4D 15 16 16.5 17 17.5 18 18.5 19 20 mm indexable insert drill bit set WCMX030208 WCMT Shallow Cooling hole Wholesale. Buy Directly From Merchant BEYOND Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.