zvd pack 6mm double cut tungsten rotary burrs tungsten shank filing engraving grinding bits for rotary tools

burrs, conical point, single cut, 22.2mm length, 12.7mm thickness, made of alloy steel. designed for professionals and do it yourselfers. includes 6 common shapes dome shaped cylinder, rounded shaft, concave arch with ball point, cone, cylinder, inverted cone. double chamber is more suitable for rel