This diamond cut ball carbide burr is perfect for hollowing and shaping an area, while also used to form concave cuts on various materials with greater control. This burr boasts a longer life span due to the chip out. The diamond cut changes the shape of the grinding material by producing smaller chips or even powder. Materials include ferrous metals such as steel and cast iron, nonferrous metals such as brass and copper and a variety of hardwoods. Individually packaged in a plastic tube for protection. Stocked with 1/4" shank that is engraved with the part number and manufacturing quality control number.