Working with metal? This corner rounding end mill cutter is a seriously handy tool to have in your workshop! The model is R8-FMB22 with 7/16-20UNF threading, specifically designed for assembling 50mm and 63mm diameter cutter heads on your milling machine. Made from high-quality steel that's seriously hard and durable, it features low cutting resistance that makes your work smoother and more efficient. The design includes great chip removal space so those metal shavings don't build up and mess with your cut quality. Whether you're working on sheet metal, precision parts, or any project that requires clean, rounded edges, this end mill delivers professional results. The arbor design ensures solid attachment to your machine, reducing vibration and improving cut accuracy. It's produced under strict quality standards, so you can trust it to perform consistently job after job. Perfect for machinists, metalworkers, hobbyists, or anyone running a milling operation where clean corner rounding matters. The tool comes as a single unit ready to install and start working. If you have any questions about using it or compatibility, the manufacturer provides solid customer support to help you out. Upgrade your milling capabilities with this specialized cutter that makes rounded edges and smooth finishes much easier to achieve!