About This Shape: 8pcs Carbide Rotary Burr Set includes SA-5竊똕A-3竊똕C-3竊똕C-1竊똕D-3竊똕D-1竊똕F-5竊똕F-3 - Solid tungsten carbide cutting burrs drill for die grinder accessories - fit most Rotary die grinder power air tools Durable: These rotary tool bits are made with premium carbide tungsten steel, a highly durable material which is guaranteed to withstand the test of time, Machined from new raw tungsten carbide, hardness can reach to < HRC85, lasts long working life, sharp and durable, this tungsten grinder bit set is superior to any high speed steel burr bits on the market Usage: Widely used for metalwork, tool making, model engineering, welding, chamfering, casting, grinding, milling, cylinder porting and sculpting, easy to grasp and use, safe and reliable Wide range of uses includes body shops, Fabrication shops, Aviation industry, Drake shops, Industrial shops, Die manufacturers, Metalwork, Tool making, Model engineering Target: This is an essential bit for metalworker & DIYcarving fans, easy to grasp and use, safe and reliable