Atlas Cutting Tools stock a range of premium USA made, multi-functional Solid Carbide Threadmills for the production of internal and external threads. Our range of Solid Carbide Threadmills are all available at affordable prices and with same day shipping. Solid Carbide ALTiN Coated Threadmills Our Threadmills are ALTiN (Aluminum Titanium Nitride) high performance coated. This coating is extremely heat resistant and can be used with or without coolant. It is exceptional in difficult to machine materials.