Dewalt DT70765T Extreme FLEXTORQ Screwdriver Bit Set in Connectable Case (42 Piece) The Dewalt DT70765T is a Screwdriver Bit Set designed for use with Impact Drivers. The 42 Piece FLEXTORQ Set is made up with a mixture of 25mm and 57mm long Bits and a Magnetic Bit Holder with Torsion Zone. FLEXTORQ Bits are designed with a torque zone to absorb the highlights in the torque, allowing optimal bit flexibility and a longer life in demanding applications. They are stored in a Connectable Tough Case compatible with the TSTAK System via the DT70716 Caddy and Large Tough Case. Features: Contoured area of the bit flexes with the torque of the impact driver to absorb torque peaks and protect the bit for longer life DEWALT branded torsion zone Includes a torsion zone bit holder for use with 25mm screwdriver bits Longer life on 25mm bits when used in a torsion zone bit holder Small Tough Case Connectable Case allows multiple sets to be stacked and locked together TSTAK compatible to hold all you