The Bosch Bulldog tough rotary hammer bit features a four-cutter head, for an SDS-plus with fast drilling and enhanced durability in concrete with rebar. This bit delivers 2X life vs. standard SDS-plus bits. These bits feature a four-cutter design, helping to prevent the bit from getting stuck in rebar, one cutting edge that hits the rebar no matter the angle, so it doesn't get stuck and break. The four-flute design aggressively pulls dust away from the work, for fast drilling and longer bit life. This bit provides accurate centering, making it ideal for anchoring. | Bosch 5/8 x 8-in Bulldog Steel Hammer Drill Bit, 1 unit HC4C2102