The DEWALT DT70512T Impact Torsion Screwdriver Bit Set contains a selection of high performance impact torsion bits that have been designed for use with impact drivers. Preferred by professional users for maximum hold, tight access and no run out. The CNC precisely machined bits have a torsion zone that absorbs peaks in torque allowing optimum bit flex for maximum life in tough Impact or High Torque industrial applications. The bit holder features a magnetic screw lock system that is 10x stronger than the average holder, with an aluminium screw lock sleeve for use with torsion bits 50mm and above. Plus an 85mm bit tip holder with removable sleeve for use with 25mm bits and a compact rapid load for use with bits 25mm and above. Both provide excellent hold, reach, stability and accessibility in all screwdriving applications, even the most awkward to reach. Supplied in a compact bit case to safely store screwdriver bits and long and short magnetic screw guides. Contains: 12 x 25mm Impact Screwdriver Bits: PH1, PH2, PH3, PZ1, PZ2(3), PZ3, SL6, T20, T25 & T30 1 x Compact Magnetic Drive Guide 1 x Long Magnetic Drive Guide