●Ultra-fine particle cemented carbide
●45°helix angle
●Unique arc clearance angle design
●Smooth cutting edge, smooth chip removal, high precision, long service life, it is the best choice
for high-speed machining ●Applicable cutting materials: A3, S45C , S50C, 40Cr, 42CrMo, 20Cr, Cr12, H13, NAK80, 718 and other carbon steel structural steel, alloy structural steel, cast steel, die steel, etc. (HRC55)