Black Hawk Abrasives 10-piece aluminum cut tungsten carbide burr set features ten of our most popular miniature rotary files, all with 1/8 inch shanks and 1/4 inch cut diameters, designed for non-ferrous metals and other softer materials. Each engraving burr is made with premium tungsten carbide and ground using top-of-the-line 5 axis CNC machines for precise flute uniformity and vibration free cutting action. Carbide burrs are one of the most versatile tools for forming and shaping metals and non-ferrous materials on the market today. These small grinder bits attach to a pencil grinder, die grinder, or rotary grinder and are great for stock removal of all kinds especially in confined spaces. Included Carbide Burr Shapes: SB-51NF end cut cylinder burr – Deburring and interior contouring, SC-51NF ball-nose cylinder burr – Deburring, surface milling and contouring, SD-51NF ball shape burr - Contouring, hole deburring and milling, SE-51NF egg shape burr - Contouring, SF-51NF rounded tree shape burr – Cutting narrow contours, SG-51NF pointed tree shape burr - Cutting narrow contours and milling, SH-51NF flame shape burr - Contouring, SL-51NF taper shape burr – Cutting narrow contours and surface milling, SM-51NF pointed cone shape burr – Cutting very narrow contours and surface machining, SN-51NF inverted cone burr – Edge machining from the rear in hard-to-reach areas. All these die grinder bits are aluma cut making them ideal for softer materials such as aluminum, brass, copper, carbon fiber, magnesium, zinc, plastic, etc. Furthermore, the single, wide flute of aluminum cut burrs peels away softer materials instead of grinding through thus reducing heat buildup and preventing gumming. This kit was assembled with versatility and precision in mind. These pencil grinder bits offers the ability to do detail work in the tiniest areas or on jobs where maximum control is paramount.