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 & accurate holes within hard & softwood ideal for making access for wiring pipes & general carpentry. The Extreme impact ready bits offer greater durability the bevelled outer cut edges enable precise positioning of the drill & a clean hole pattern even in wood with nails. The steel construction offers extra thick & robust for outstanding durability. 1/4in shank ensures easy & slip-proof clamping. The modular stackable medium tough case has been designed for secure storage of accessories. The clear lid offers easy identification & easy bit removal & replacement. Use the locking system to connect the cases together & securely stack on top of the medium Toughcase.