High-speed, high quality, fast-cutting steel burrs for shaping, grooving, slotting and hollowing. For use on metals, alloys, plastics, fibreglass and wood. Compatible with most rotary tools including Silverline, GMC and Dremel. Includes 3 x cylindrical, 1 x cone, 1 x ball and 1 x point. Max 28,000rpm. 3.17mm mandrel. High-speed, high quality, fast-cutting steel burrs for shaping, grooving, slotting and hollowing. For use on metals, alloys, plastics, fibreglass and wood. Compatible with most rotary tools including Silverline, GMC and Dremel. Includes 3 x cylindrical, 1 x cone, 1 x ball and 1 x point. Max 28,000rpm. 3.17mm mandrel.