4-Flute HSS End Mill Cutter Set - 4mm-12mm Straight Shank For CNC Milling

Machinists and CNC operators, these 4-flute end mills are workhorses for your milling projects! Made from high-speed steel (HSS), they offer excellent toughness and wear resistance for machining various materials including copper, aluminum, tool steel, and cast iron. The 4-flute design provides smoother finishes and better chip evacuation compared to 2-flute end mills. Available in six useful sizes: 4mm, 4.5mm, 6mm, 8mm, 10mm, and 12mm cutting diameters with corresponding shank sizes. The straight shank design works with most CNC machines, milling machines, and routers. These cutters can handle both roughing and finishing operations, and they're tough enough for machining pre-hardened materials. The geometry is well-designed for efficient material removal while maintaining tool life. Perfect for precision work in machine shops, hobby CNC projects, or industrial applications. The quality is solid - the flutes are sharp and evenly spaced, the cutting edges are precise, and the overall construction feels durable. Whether you're profiling, slotting, plunging, or contouring, these end mills deliver reliable performance. Much better than cheap import tools that dull quickly or break under pressure. If you need versatile cutting tools that can handle various materials and operations without frequent tool changes, this selection covers the most commonly used sizes for general machining work.