Milwaukee 4932479853 Shockwave Impact Duty Screwdriver & Drill Bit Set (39 Piece) The Milwaukee 4932479853 is a 39 Piece Screwdriver and Bit Set designed for use with Impact Drivers. The drills cover drilling applications in Multi-Materials including brick plastics wood and masonry and also metal. The bits have laser hardened WEAR GUARD TIPS for improved wear resistance and protection of the fit over the life of the bit. The SHOCKWAVE IMPACT DUTY accessory line is not only ideal for heavy-duty impact applications but also delivers a full system solution for all the user\'s drilling and fastening needs. Features: The combination of the SHOCK ZONE design and special heat treatment absorbs impacts and allows the bit to flex with spring-like action Custom engineered steel - Milwaukee custom metal formula makes the SHOCKWAVE bits more resistant to shock from impacting SHOCK ZONE Geometry - designed to flex SHOCK ZONE reduces stress at the tip resulting in less tip breakages Contains: 7 x Multi-Material drill bits - 10, 8, 2x 6, 5.5, 5, 4mm 8 x Red Hex Titanium drill bits - 6, 2x 5, 4.5, 4, 3.5, 3, 2mm 23 x 25mm Shockwave screwdriver bits: PH1, 3x PH2, PZ1, 3x PZ2, PZ3, 2x TX10, 2x TX15, 4x TX20, 3x TX25, 3x TX30 1 x magnetic blade holder 60 mm