5/8" cutting diameter, 4 flutes, single end, ball nose, long reach length, AlTiN coated.
Ground from solid carbide. This tool cuts 5/8" diameter, runs a 5/8" shank, has 1-1/4" 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.
AlTiN is built for heat: stainless, tool steels and high-temperature alloys, especially with little or no coolant.
Free TechTips resources for end mill users — machinist tested.
More help: Milling TechTips · Troubleshooting · Carbide vs. HSS Guide