Rotary Burr, Cone Tip, Single Cut, 22.2mm Length, 12.7mm Thickness, Made of Alloy Steel. Designed for Professionals and DIYers. Includes 6 common shapes: Dome Cylinder, Rounded Shaft, Concave Arc with Ball Tip, Cone, Cylinder, Inverted Cone. Dual Chamber is more suitable for materials with relatively low density. Universal Size–6mm Shank, compatible with all electric and cordless drills, air tools, grinders and other rotary tools. Durable and Reliable–Machining hardness reach up to HRA85. Can replace a small grinding wheel for most jobs, without creating dust pollution. Processing all kinds of metals (including all kinds of hardened steel) and non-metallic materials (such as marble, bone, jade). Use on drills, presses, lathes, hand-operated or flexible shaft electric or pneumatic devices. Can replace a small grinding wheel for most jobs, without creating dust pollution. Safe and reliable, can reduce labor intensity.