The Milwaukee 4932472055 is a 16 piece screwdriver bit set supplied in a puck holder with a 60mm bit holder. The kit contains PH, PZ and Torx bits. 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. Rotate the puck to your desired bit and remove it through the window. The puck holder has a magnetic base.