Tiny Endmills
The collet will hold up to 8 mm shank end mills and the spindle is driven by a brushless DC motor up to about 8000 RPM. I have lathes that use the same collets that are great for small turning jobs. That is actually a re-purposed lathe headstock on the mill. The pictures show it cutting a .050" keyway in 12L14 with a HS end mill.