Features: Carbide burrs extremely versatile, used in mold manufacturing. Various metal and non-metal craft carving, such as mold carving, arts and crafts trimming. Cleaning trimming,veining and weld joint of casting, forging and weld, such as machine casting plant, shipyard, automobile factory, etc. Mechanical parts chamfering, rounding and groove processing. Clean the pipe, finish machining the inner hole surface of mechanical parts, such as machinery plant, repair factory, etc. Repair of the impeller passage, such as automobile engine plant. Specifications: Material: tungsten steel Size: 6mm shank, 8mm head (blade diameter), about 65mm length Head type: A/C/D/F/G Quantity: 5 PCS Packaging: neutral white plastic box Type: double striped rotary file Weight:100g Tungsten steel rotary burr bits has the following characteristics: 1.Processing all kinds of metal(including all sorts of hardened steel) and non-metal (such as marble, jade, bone) 2. For the most work it can be replaced with small grinding wheel,and no dust pollution 3. Good quality and highly polished, and can work out various shapes high -precision mold cavity. 4. Easy to use, safe and reliable, can reduce labor intensity. 5. High efficiency, high-quality finish, long service life, good economic returns. Package Included: 5 x Rotary Burr Bits Note: Tungsten steel grinding head: mainly used in pneumatic or electric drive vehicle, speed is 6000-50000 revolutions per minute, Please clamp the tool firmly and erected when used , reverse milling is better, avoid reciprocating cutting.Please use safety glasses to prevent scraps flying at work. 2. Due to manual measurement, there will be 1-3mm error of the total length.