AlTiSiN Coated 4 Flute Internal Radius Milling Cutter Tool For Mold Surface Machining. Changzhou AMG Precision Tools Co.Ltd. is a manufacturer specializing in the production of solid carbide cutting tools, including end mills, drills, reamers and customized non-standard tools. We are equipped with advanced German Walter grinders and Zoller measuring instruments to ensure that each product has excellent precision and consistency. Specifications: Name Al Ti Si N Coated 4 Flute Internal Radius Milling Cutter Type Customized Coating Ti AIN, DLC/Zr N/Super Finish Coating Suitable for Copper, stainless