Cheap And Discounts ER Spring Collet ER11 ER16 ER20 ER25 ER32-1 2 3 4 5 6 7 8 9 10 11 12 20mm High Precision 0.015mm Milling Tool Holder CNC Wholesale. Buy Directly From Merchant DC Tool Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.