Milwaukee 4932472058 Impact Duty Bit Set with SHOCK ZONE Geometry - designed to flex, reducing stress, resulting in less tip breakages The Milwaukee 4932472058 is a 57 Piece Bit Set designed for use with impact drivers. 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: Laser hardened WEAR GUARD TIP for improved wear resistance and protection of the fit over the life of the bit SHOCK ZONE Geometry - designed to flex SHOCK ZONE reduces stress at the tip resulting in less tip breakages 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 Contains: SHOCKWAVE screwdriving bits: 49 x 25 mm length 2 x PH1 / 3 x PH2 / 1 x PH3, 3 x PZ1 / 5 x PZ2 / 2 x PZ3, 3 x TX10 / 3 x TX15 / 4 x TX20 / 4 x TX25 / 4 x TX30 / 3 x TX40 / 2 x TX50, 2 x Hex 4 mm / 2 x Hex 5 mm, 2 x SL 0.6 x 4.5 / 2 x SL 0.8 x 5.5 / 2 x SL 1.2 x 6.5  SHOCKWAVE screwdriving bits: 7 x 50 mm length 1 x PH2, 1 x PZ1 / 1 x PZ2, 1 x TX10 / 1 x TX15 / 1 x TX20 / 1 x TX25 1 x SHOCKWAVE magnetic bit holder 60 mm length