Cheap And Discounts SER1212H16 SER1616H16 SER2020K16 SER2525M16 Thread Holder External Thread Turning tool 16ER AG60 Carbide Inserts Cutting tool Wholesale. Buy Directly From Merchant BEEBLING Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.