Sincereetali Burrs, conical point, single cut, length 22.2 mm, thickness 12.7 mm, made of alloy steel. Designed for professionals and DIY enthusiasts. Includes 6 common shapes: Dome cylinder, rounded shank, concave arc with spherical point, cone, cylinder, inverted cone. Double chamber is more suitable for materials with relatively low density. Universal size - 6 mm shank, compatible with all electric and cordless drills, pneumatic tools, grinders and other rotary tools. Durable and reliable - Machining hardness reaches up to HRA85. Can replace a small grinding wheel for most jobs, without creating dust pollution. Processing all types of metals (including all types of hardened steel) and non-metallic materials (such as marble, bone, jade). Use on drills, presses, lathes, hand-held or flexible electric or pneumatic devices. Can replace a small grinding wheel for most jobs, without creating dust pollution. Safe and reliable, can reduce labor intensity.