Cheap And Discounts SER1212H16 SER1616H16 SER2020K16 SER2525M16 external thread tool holder CNC thread tool + MMT16ER external thread turning tool Wholesale. Buy Directly From Merchant AK Tools House Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.