This is a really great tool. Supplied with 3 smooth carbide inserts and a 5/32" hex wrench. The shank has a welded face and fits perfectly into a fixed tool holder for CNC use. Allows you to cut aluminum and steel very smoothly all day long at over 12,000 rpm. I don't know how long the original carbides will last as I've only had them for a month at the moment, the shipping cost is a bit high but it's from Canada.