Made from Tungsten Carbide, can be used to process: iron, steel etc. 1/8 inch 1/8 inch head diameter and 1/8 inch 1/4 inch head diameter. length: 45-50 mm( 1.77-2 inch).Great addition to tools,-pencil die grinder,compatible with ,,Beyond,,,Fixtec,,,,,,,,,,,,,,,, and so on.The groove lines of these carbide 's head are crossed, more suitable for an object whose density is relatively low, such as wood, , jade, ceramic, glass jewelry making,welding, chamfering, casting, deburring, grinding, cylinder head porting and sculpting, and some Soft Metal.Not for: Epoxy.Sharp,durable and balanced. The carbide set cuts through hard materials like a hot knife through . No wear out after a long time use. The shaft will not bend at high speed.Carbide set, packed with plastic case for safety storage and protection. High efficiency, high-quality finish, long service life, good economic returns.The working life of these solid is 10 than high-speed steel and 200 than grinding wheel.Material: Cemented carbidecolour: silveryPackage Contents:20 x Rotating burrsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.