Which of the blades in this kit will you use the most? Perhaps one of the nine nutdrivers (3/16"-1/2") or hexdriver blades (.050"-3/16") or possibly the nine spline driver blades (.048-.183) and the seven screwdriver blades (four slotted 1/8"-5/16", 3 phillips #0, #1, #2). Maybe your favorite part is the 1/4" magnetic nutdriver blade or the reamer (1/8"-3/8") or even the 4" extension and the T or regular style handles. No-matter which is your favorite, this kit has everything you need in a compact roll up pouch that takes less space in your tool case. 39 pieces.