Chipbreaker micro-grain solid carbide spiral router bits give you a great finish on top because this spiral bit pushes the material you are routing down from the top leaving a chip-free finish on the surface of a dado or groove. This type of chip breaker bit is used mainly in CNC machines but can also be used in a router table or hand-held router. SOLID CARBIDE IS NOT GUARANTEED AGAINST BREAKAGE. Note: Chipbreakers can be added to any solid carbide bit by adding CB to the end of the part number. If the item is not listed here, call 801-592-7835 to order. Industrial quality spiral bits manufactured in the USA by Southeast Tool. Legend below explains sizing. Select your item(s) then click Add to Cart.