1/8" SG shape carbide burr, double cut, pointed tree.
A rotary burr for deburring, weld dressing, shaping and blending in a die grinder or air tool. This one cuts 1/8" diameter with 1/2" of cut on a 1/8" shank, 3" overall.
The double cut crosses two rows of flutes, which breaks the chip up small, keeps the tool from grabbing and leaves a smoother finish with less vibration.