DeWalt® Rock Carbide™ SDS Plus® hammer bit. For use with electric or cordless rotary hammers. Used for drilling holes in poured concrete and other masonry up to 1-1/8 in diameter. Used by mechanical contractors for drop-in anchors to hold threaded rod for water and waste lines, cable tray, HVAC ducts, etc. DeWALT® Guaranteed Tough® Masonry Drill Bit, 2-Cutter, 3/16 in Drill Bit, Round Cutting, 6-1/2 in Overall Length, 4-1/2 in Cutting Depth, 4 Flutes, Spiral Flute, 4-1/2 in Flute Length, 25/64 in Shank, SDS-Plus® Shank, Rock Carbide® Point, Right Hand Cutting Direction, Carbide Cutting Edge, Steel, Bright, Silver, Applicable Materials: Concrete and Masonry