Picquic SixPac Plus Multi-Bit Screwdriver with 7 Allen Metric Bits, Assorted Colors Popular SixPac Plus screwdriver loaded with 7 Picquic Allen Metric bits Each screw bit is 3" long, 1/4" hex shaft. Fits power drivers, too. Allen Metric Sizes: 2mm, 2.5mm, 3mm, 4mm, 5mm, 5.5mm, 6mm Handle colors may vary. Screwdriver with bit is 8" long.