Cheap And Discounts CNC Spoilboard Surfacing Router Bits, 1/2 Inch Shank 2-1/4Inch (Dia.) Bottom Cleaning Router Bits With Carbide Tipped Wholesale. Buy Directly From Merchant YINGJIU Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.