Black Hawk Abrasives 5-piece double cut tungsten carbide burr set features five of our most popular rotary files all with ¼ inch shanks and 3/8 inch cut diameters. Each 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 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-3 cylinder with end cut - Deburring and interior contouring, SC-3 radius end cylinder burr – Deburring, surface milling and contouring, SD-3 ball shape burr - Contouring, hole deburring and milling, SF-3 rounded tree shape burr – Cutting narrow contours, SL-3 taper radius end burr – Cutting narrow contours and surface milling All these die grinder bits are double cut making them ideal for harder materials such as steel, stainless steel, titanium, etc. Furthermore, the crosscut flutes produce faster stock removal, reduced loading, small chips and thus a smoother finish than single or aluma cut burrs. This kit was assembled with utility and cost effectiveness in mind. We asked ourselves, if we needed 5 burrs to get most jobs done, which would we choose? This was our answer. With this carbide burr set you can quickly and easily debur, contour, prep welds and much more in a virtually any nook, cranny, hole, divots or at any angle. Each set includes a twist lock display case for easy storage.