Micro Grain Carbide Roughing End Mill, Zrn-A Coating, 4-Flute, Speed Tiger Before you buy: Speed Tiger end mills require correct spindle speed / feed rate for best performance and to avoid breakage. Contact the seller for more info. Specifications: 4 flutes Cutting Diameter: 1/4" Cutting Length: 3/4" Shank Diameter: 1/4" Full Length: 2-1/2? Package Contents: 1pc/package SPEED TIGER PRECISION TECHNOLOGY CO., LTD. stands for High-Quality. Established in 1998, Speed Tiger specializes in the production of precision carbide end mills, inserts, and other tungsten carbide steel cutting tools. Speed Tiger crafts cutting tool at nanometer precision. The world's highest precision, 2?m, enables users to achieve unsurpassed cutting quality and performance. Advanced Production Facilities Technology - Speed Tiger has 73 sets of grinding machines from Germany, Switzerland, Japan and Taiwan. Professional Coating Facilities Technology - Speed Tiger has its own coating facilities with equipment from Ionbond and Platit of Switzerland. This gives Speed Tiger the ability to develop specialized coatings based on customer requirements. Precise Quality Control Policy - From raw materials to finished products, Speed Tiger insists on a strict inspection policy to make sure every product consistently meets exacting quality standards. Identity Number - Speed Tiger created the End Mills Traceability System in order to ensure the accountability of each process participant. Each end mill has its own identity number on its shank. GENERAL ROUGHING CUTTER - Speed Tiger 600 Nano carbide tools excel at working carbon steels (~HB225), alloy steels (HB225~325), pre-hardened steels (up to HRC45), hardened Steels (HRC40~45), cast iron HIGH PERFORMANCE FOR HARD MATERIALS - Cutter is made of Micro Grain Carbide that is very tough, resists wear and offers high cutting performance ZrN-A COATING - Zirconium nitride (ZrN) +Titanium aluminum boron nitride (AlTiBN) coating lubricates the end mill for stability at high temperature and superior wear resistance at high cutting speeds, offering better heat resistance than TiAlN, TiN or TiCN coatings HIGH-QUALITY - Flutes ground by a world-class ISO-9001 Factory; Great performance at a competitive price. DEDICATED SUPPORT - Contact seller via Amazon anytime for cutting condition data to get the best performance from your Speed Tiger cutters