This 8-piece new and used boring bar set is perfect for any metalworking project. The 1/2" shank bore allows for a secure grip and precise cuts. The C-2 carbide tip ensures durability and longevity in use. Ideal for use in CNC machines, these boring bars are compatible with a variety of adapters and holders. Designed for use in the industry, this set is perfect for professionals and hobbyists alike. Recovered from Estate Liquidation sale and after researching the internet we have learned that the C-2 means these boring bars were designed to cut cast iron. Note: 5 of these bars have not been used and are Brand New. The cutting tools are still sealed with a protective covering on the head of the tool. 3 have had there protective covering removed and MAY have been used. Hard to tell. Discounted price because of this. Look closely at the pictures to see if this is the set for you! Selling As Is As Found.