10 x PZ2 Impact Duty 50mm Screwdriver Bits with a combination of the SHOCK ZONE design and special heat treatment to absorb impact The Milwaukee 4932472050 PZ2 50mm long Screwdriver Bits are 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. Equipped with laser hardened WEAR GUARD TIPS for improved wear resistance and protection of the fit over the life of the bit. Features: 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 Specification: Quantity: 10 pieces Type: PZ2 Total length: 50mm