28324 Features: -Micro drill.-Material: Tungsten carbide.-With ideal cutting angle of 6 degrees.-Ideal for drilling in glass, porcelain, ceramics, marble, semi-precious stones and other hard stones.-Shank size: 0.10". Dimensions: -Overall dimensions: 0.39" H x 3.54" W x 3.14" D, 0.2 lbs.