Masonry Drill Bit 3/4"X13" Positive tip geometry for best rotary drilling efficiency. All sizes 3/16" and larger have 3 flats on the shank so that the chuck gets a better grip on the bit. Wide spiral flutes efficiently remove dust and debris, from the cutting area. Used in applications such as drilling in damp masonry work, brick, cement, tile, slate and cinder block. MASONRY DRILL BITS Dia x OA Lgth In=3/4 x 13 NICKEL CHROME STRAIGHT SHANK , CD