DeWalt DWAF5453 SDS Plus Hammer Drill Bit, 3/4 In. X 6 In. X 8 InHighlights: Size : 3 4 In X 6 In X 8 In Innovative flute design for efficient material removal SDS Plus shank for use in SDS Plus hammers only Two cutter head for long life and durability Strong core : Tapered core for bit strength and maximum durability, especially when drilling deep holes Aggressive material removal : Two stage flute design with variable helix pattern allows for efficient debris removal Clean, round holes : Two sharp cutting edges