DEWALT's 3/4 in. x 16 in. x 21-1/2 in. SDS-MAX High-Impact 4-Cutter Carbide Drill Rotary Hammer Bit incorporates a wear-mark indicator that helps determine when the bit may no longer produce an accurately sized hole for anchor installation. Its four-cutter carbide head distributes cutting action across multiple edges, helping maintain consistent performance during rotary hammer drilling. The SDS-MAX shank is designed for compatible high-impact rotary hammers, while the overall 21-1/2 in. length provides extended reach without relying on an extension. With its combination of carbide cutting performance, fatigue-resistant construction, and rebar-resistant head geometry, this bit is suited to anchor-hole drilling and other demanding concrete and masonry applications where a durable, long-reach drilling accessory is needed.