The DEWALT 35 Piece Extreme Metal Drill Set features a modular, stackable medium tough case has been designed for secure storage of accessories. Clear lid for easy bit identification. Use the locking system to connect the cases together, and securely stack with small, medium, and large Toughcases. The Drill bits have been constructed from high speed steel, ensuring wear resistance and longer life. Contains: 21 x Extreme Metal Drill Bits: 1, 1.5, 2, 2.5, 3, 3.2, 3.3, 3.5, 4, 4.2, 4.5, 4.8, 5, 5.5, 6, 6.5, 7, 7.5, 8, 10, 12mm, 3 x 25mm Phillips Bits: PH1, PH2, PH3, 4 x 25mm Pozidriv Bits: PZ1, PZ2(x2), PZ3, 2 x 25mm TORX Bits: TX20, TX25, 1 x 50mm Pozidriv Bit: PZ2, 2 x 89mm TORX Bits: TX20, TX25, 1 x Magnetic Screw Guide, 1 x Magnetic Bit Holder.