Premium Material: The four flute sawtooth eccentric drill bits are made of quality alloy material with wear resistance and high hardness, which improves work efficiencyMultifunctional Drill: The skewed head eccentric drill bits Provide accurate drill on tiles, glass, brick walls, wood, concrete, metal, ceramic, etcHexagonal Shank:The four edged serrated eccentric drill bits adopt hexagon shank design ensuring good stability, and will not easily slippage or deviation, resulting in smooth pipe mouthsUnique Design: The sawtooth eccentric drill bits adopt threaded discharge groove design, expand discharge space, eccentric positioning tip design, accurate positioning, fast drillingPacking List: You will receive 3x four flute sawtooth eccentric drill bits Specification: Material: Alloy Size Chart: length: 10 cm/3.94 inch Package Includes: 3xFour Flute Sawtooth Eccentric Drill Bits Note: Please allow slightly errors 1-2cm differences due to manual measurement.