Cheap And Discounts 2pcs High Precision Adapter collet shank CNC router tool Adapters holder 6mm change to 4mm/ 6-3.175/ 12.7-6/ 12.7-6.35 mm 7 size Wholesale. Buy Directly From Merchant Boboaldo Official Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.