The WORKPRO set (WP200513) gathers the most commonly used bit profiles in a convenient hinged case with a transparent lid. Contents (31 pcs): - 1 magnetic bit holder, 50 mm (with extension) - 30 bits, 25 mm, chrome-vanadium steel (Cr-V): - SL (slotted): 3, 4, 5, 5.5, 6, 7 mm - PH (Phillips): PH0, 2x PH1, 2x PH2, PH3 - PZ (Pozidriv): PZ0, 2x PZ1, 2x PZ2, PZ3 - Torx: T10, T15, T20, T25, T27, T30 - Hex (H): H2, H3, H4, H5, H5.5, H6 Suitable for 1/4" square drivers, drills and holders for home repair, auto service and electronics.