3/8" SN shape carbide burr, double cut, inverted cone shape, 13 degree included.
A rotary burr for deburring, weld dressing, shaping and blending in a die grinder or air tool. This one cuts 3/8" diameter with 3/8" of cut on a 1/4" shank, 2-1/8" 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.
