1mm 4 Flute Ball Nose Single End Carbide End Mill, TiN Coated, Regular Length, 4mm Flute Length, 39mm OAL 4MM LOC,3MM SHANK,39MM OAL 30? helix, right hand spiral, right hand cut, 4 flute ball nose center cutting single end general purpose carbide end mill with plain cylindrical shank. C-2 grade sub-micron grain carbide with 10% cobalt content. Four flute design offers increased core diameter which minimizes tool deflection & improves accuracy. For profiling, slotting, production milling & finishing applications in a wide range of ferrous metals, including stainless steels & high temp alloys. Made in the USA. GWS/Monster Tool Part #223-001400A