Tool 150i500M030A

Sharp corners chip out in interrupted cuts and harder materials. The 0.03" corner radius on this tool addresses that weakness.

Five flutes reduce chip load per tooth at any given feed rate, which matters when you're semi-finishing or finishing work-hardened steels, titanium, or inconel.
The TiAlSiN coating adds another layer of thermal protection.
Aluminum content helps it stay stable at higher cutting temperatures than standard TiN or TiCN.
The corner radius strengthens the cutting edge where it needs it most.
You lose some theoretical sharpness but gain edge retention in materials that want to work-harden under the tool.
For 0.500" diameter work in steel, iron, titanium, and nickel alloys, that tradeoff typically extends tool life.