Bosch, 1 pc, -7/8" x 8" x 10" SDS-Plus Bulldog Tough Rotary Hammer Bit. Four-cutter carbide tipped head design – delivers up to 2X life in concrete with rebar. Four-cutter head – provides four cutting edges to hit rebar, to help prevent the bit from getting stuck. Centering tip – ideal for drilling anchoring holes to enhance the precision of hole placement. Four-flute design – standard flute design efficiently pulls dust away from the hole. Bosch-made carbide – manufactured by Bosch with quality materials promoting durability and longer life. Diameter: 7/8 Inch, Usable length: 8 Inches, and Overall length: 6 Inches (HC4C2146)