Machinists and metalworkers, listen up! This YG-1 carbide end mill is a serious tool for serious work. It's a square nose design with a 1-inch cutting diameter and 1-inch shank diameter (4 inches overall length). Has two flutes and a 30-degree helix angle, which is great for general-purpose milling. The center-cutting design means you can plunge into material like a drill bit - perfect for slotting, drilling pockets, and similar operations. Made from uncoated carbide (that's the bright finish), which is harder than high-speed steel and handles higher temperatures better. Works on a bunch of tough materials: hardened steel, alloy steel, cast iron, brass, copper, even abrasive plastics. The two-flute design gives better chip clearance than tools with more flutes, especially when you're taking deep cuts. Cutting diameter tolerance is tight (+0.0000\ to -0.0012\). If you're running a shop, doing fabrication, or have heavy-duty DIY projects, this end mill delivers precision and durability. Just match it to your material and machine capabilities. Quality tool from a reputable brand.