58 inches 11 inches 16 inches Cutter Spline Shank Rotary Hammer Bit The DeWalt 58 inches 11 inches 16 inches cutter spline shank rotary hammer bit is an extremely durable and useful attachment. Use this to increase your efficiency and decrease your work time. Superior build quality means you will be using this bit for years with minimal wear and tear. must have for any professional or do-it-yourselfer. Features ROCK CARBIDE tip maximizes carbide surface contact for longer bit life Open head design channels dust into flutes for quicker drilling Longer helix four flute design expedites mill removal for quicker drilling Specifications Diameter 58 inches Usable Length 11 inches Overall Length 16 inches DEWALT is firmly committed to being the best in the business, and this commitment to being number one extends to everything they do, from product design and engineering to manufacturing and service.