Alright, woodworkers and CNC folks, listen up. This YONICO router bit is a serious little tool. It's an upcut spiral end mill with a 1/8-inch cutting diameter and a 1/4-inch shank, so it'll fit in most standard router collets and CNC spindles. The 'upcut' design means the flutes pull the wood chips upward and out of the cut as you're milling. This is awesome because it keeps your work area clear, helps prevent the bit from getting clogged, and reduces the chance of breakage. It's made from premium C3 micro-grain solid tungsten carbide—fancy talk for a super hard, durable material that stays sharp. The whole bit is polished to a mirror finish for smooth operation and precision. It's got 2 flutes, which is a sweet spot for clean cuts in materials like MDF, softwoods, and hardwoods. Use it for standard milling jobs, cutting dados (grooves), or boring holes. Works great on a CNC machine, a router table, or even a handheld router. Just remember, because it's an upcut, the top surface of your workpiece might have a tiny bit of fuzz or roughness. If you need a perfectly clean top edge for a final pass, you might want a downcut bit. But for efficient material removal and overall use, this bit is a workhorse. Part number 31209-SC if you need to reference it.