The DEWALT Impact Torsion Screwdriving Set features CNC precisely machined bits with a torsion zone to absorb peaks in torque. The set allows optimum bit flex for maximum life in Impact/High Torque applications. The 15 piece set has a longer life, faster, more accurate screw driving thanks to a specially designed bit tip which optimises the fit into the fastener and eliminates wobble and stripped screws. Preferred by professional users for maximum hold, tight access, and no run out. Supplied in a Magnetic Tough Case. Contains: 3 x 25mm Phillips Bits: PH1, PH2, PH3. 4 x 25mm Pozidriv Bits: PZ1, PZ2(2), PZ3. 2 x 25mm TORX Bits: T20, T25. 2 x 50mm Phillips Bits: PH2, PH3. 3 x Socket Drivers: 7mm, 8mm, 10mm. 1 x Magnetic Bit Tip Holder.