1/16" SB shape carbide burr, double cut, cylinder with end cut.
A rotary burr for deburring, weld dressing, shaping and blending in a die grinder or air tool. This one cuts 1/16" diameter with 1/4" of cut on a 1/8" shank, 1-1/2" 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.