Cut 3 rapid cut carbdide rotary burrs are ideal for use on softer non ferrous and plastic materials, i.e aluminium, fibreglass, plastics, hard rubber and zinc alloys. Features and Benefits Solid carbide construction for increased strength Ideal for use on softer non-ferrous and plastic materials Typical Applications Deburring Polishing Cast iron Cast steel Carbon steel Alloy steel Stainless steel etc Materials up to HRC65 hardness Please note: Work piece and tools should always be steady and well supported. Carbide burrs are not suitable for 'milling' large amounts of material, they are for light stock removal and high revolutions 'LOW FEED - HIGH SPEED'. Always ensure that at least 70% of the shank length is clamped by the collet or chuck of the tool being used. Always ensure that the tool is rated to the recommended operating speed of the burr.