The Premium Tool & Abrasives Co Ltd. Carbide Burr 1/4" x 1/4" Round (Ball) - Double Cut solid carbide rotary burr. Used in metal and non ferrous metal applications for grinding edges and contours. Double Cut Burrs have a chisel tooth cutting pattern, these burrs produce small chips instead of long, sharp slivers. This eliminated loading of the burr's flutes and minimizes chatter. This is the smoothest and most popular cutting style. Best on steel, stainless steel, and alloys. Double Cut solid carbide rotary burrs are available in a wide variety of shapes including: Cylindrical End Cut, Cylindrical Ball Nose, Round (Ball), Oval (EGG), Round Tree, Pointed Tree, and Flame.