Hard alloy burr sets include: SB, SC, SD, , SL, and SE-type burrs.Different shapes can meet your needs, spherical, cylinder shape, oval, tree radius end, flame shape, cylindrical radius end, cone-shaped radius. Made of hot-treated tungsten carbide YG8, which is 10 times higher than .They maintain a cut blade in a longer period of time, and can withstand higher temperatures when you apply friction without deformation.It is suitable for processing metal materials, including less than equal HRC70 hardening steel. Double-cut unique tooth angle will leave a smoother due to smaller crumbs.-cutting design is suitable for internal contour work and milling. High-intensity and super- cut teeth provide better control and quickly remove the blank materials of hard materials, save working time and maximize your production efficiency.Due to the decrease in pulling, accurate and faster penetration and satisfactory results, you can reduce the fatigue of operators. Hard alloy burr is a tool for precision grinding, cutting, welding, jewelry production, woodcarving, molding, model engineering, cylinder transplantation and carving tools.In addition, it is also used to remove burrs, remove burrs, excess materials, edges and welded beads. Whether you are the first time, apprentice or professional, each of our burrs standards have advanced design and quality, and can achieve high-precision and high-efficiency excellent performance.We that you are satisfied with 100%. Colour:Silver Material:alloy Package Contents: 1set * carbide drill bits(10PCS) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.