Carbide Ammco Style Positive Rake Round Rotor Cutting Bits for Disc/Drum Lathes (10 Pieces) by Shark®. Hardened carbide bits with less wear and tear than typical OEM bits. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost.