1/2" cutting diameter, 4 flutes, single end, ball nose, long reach length, uncoated.
Ground from solid carbide. This tool cuts 1/2" diameter, runs a 1/2" shank, has 1" of flute and measures 6" overall.
The ball nose leaves a radiused bottom, which is what you want for 3D contours, fillets and mould surfaces rather than flat floors.
The necked long-reach body gets the cutting edge down into a deep feature while keeping the shank close to full diameter for rigidity.
Uncoated, so the edge stays as sharp as it can be ground — the usual choice for aluminium and other soft, sticky materials.
Free TechTips resources for end mill users — machinist tested.
More help: Milling TechTips · Troubleshooting · Carbide vs. HSS Guide