1 Pc. Supermill Brand New Made in USA 5/8" x 1-1/4" (LOC) x .030-.035 (Radius) "Alcrona" Coated XP- 4 FLT High-Performance Solid Carbide End Mill.SUPERMILL XP Corner Radius End Mills have heavy-duty geometry for "work horse" applications. Best cutter for slotting and heavy cuts in most materials including steel over 45 Rc.Features:Corner RadiusVariable Pitch4 FluteFull Eccentric Relief45 Deg. HelixAlcrona, AlCrN - Aluminum Chrominum Nitrite CoatingFor improved performance over AlTiN in steel and steel alloys under 56rc, harder Stainless such as 17-4ph and 400 series. Increases in tool life can be seen in some high Nickel alloys and applications where dry milling is needed.