The DEWALT 9 Piece Extreme Impact Ready Flatwood Set contains a variety of wood drill bits suitable for impact drivers rotary hammer or cordless drills. The flat bits are great for drilling fast and accurate holes within hard and softwood ideal for making access for wiring pipes and general carpentry. The Extreme impact ready bits offer greater durability the bevelled outer cut edges enable precise positioning of the drill and a clean hole pattern even in wood with nails. The steel construction offers extra thick and robust for outstanding durability. 1/4in shank ensures easy and slip-proof clamping. The modular stackable medium tough case has been designed for secure storage of accessories. The clear lid offers easy identification and easy bit removal and replacement. Use the locking system to connect the cases together and securely stack on top of the medium Toughcase.