Shop quality screwdrivers designed for comfort and durability. Featuring dual density grips and heat-treated, chrome vanadium tips and shafts The SD-0 #0 is a 1/8` shaft, for those small computer cross-tip screws and many hydraulic brake reservoir caps The SD-2 #2 is a 1/4` shaft, perfect for derailleur adjustment screws It is the most common cross tip (`Phillips`) required. Screwdriver 3mm Flat SD-3