3/8" cutting diameter, 3 flutes, single end, TiN coated.
This tool cuts 3/8" diameter, runs a 1/2" shank, has 2-1/4" of flute and measures 4-1/4" overall. The flutes are cut at a 30° helix. The body is tapered at 1/2°.
Center cutting, so it can plunge straight down before feeding sideways.
The TiN coating adds surface hardness and lubricity over uncoated carbide or HSS in general-purpose work.