Micrograin Carbide Square End Mill - 4 Flute, 4T Design (5pcs, 1/4") for Alloy Steels, Hardened Steel, Metal, and Multipurpose Milling - Precision Tool Kit for DIY and Professional Use

Versatile Carbide End Mill Set: Ideal for a diverse array of materials such as copper, alloys, cast iron, and various steel grades (up to HRC 50), this set exemplifies the flexibility and robustness of end mills, rendering it an indispensable addition to milling machines and drill press equipment.

• 【Wide Application】Engineered for carbon steels (~HB225), alloy steels (HB225~325), pre-hardened steels (up to HRC45), and more, the Carbide End Mill Set excels in CNC machining, engraving, high-precision carving, and high-speed applications
• 【AlTiBN Coating】The AlTiBN-coated carbide end mill delivers 3x wear resistance, high-temp oxidation shielding, and 40% enhanced thermal stability—its nano-structured surface supports rough-to-fine machining on heat-treated materials below 50℃ for extreme dry and heavy-duty applications
• 【High-Efficiency Cutting】0.6μm micro-grain carbide 4-flute end mill with 55° helix—superior wear resistance, smooth cuts, fast chip removal, and 20% faster machining for precision and high-speed work
• 【Precision Crafted】HOYUSK's Mill Bits ensure -0.02mm accuracy across CNC lathes, engraving machines, and machining centers—delivering flawless surface finish, minimal vibration, and reliable micro-level precision for critical components
• 【Dedicated Support】Need precise cutting data? Reach out directly here on Amazon—our technical team will promptly provide custom parameters and tooling guidance to ensure you achieve maximum performance with your ideal milling solution