DEWALT SDS Plus Bits, Rock Carbide Tip, Hammer, 5/8-Inch (DW5446) Product Description SDS Plus 2 Cutter Drill Bits have a strong tapered core to help resist flute breaks, especially when drilling deep holes. For optimal drilling speeds, the two-stage flute design features a variable helix pattern that quickly moves debris away from the contact zone. Plus, the two sharp, carbide-cutting edges deliver clean, round holes for secure anchor installation. If you have our bits, we have your back. From the Manufacturer DEWALT DW5446 5/8-Inch x 6-Inch x 8-Inch ROCK CARBIDE SDS Plus Hammer Bit Features Strong core: SDS max bits have tapered core for bit strength and maximum durability, especially when drilling deep holes Aggressive material removal: Two stage flute design with variable helix pattern of DEWALT SDS hammer drill bits allows for efficient debris removal Clean, round holes: Two sharp cutting edges for true holes Wear mark indicator: For accurate diameter of holes USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.