About the Park Tool #2 Phillips Screwdriver Shop quality screwdriver designed for comfort and durability. The #2 is a 1/4 inch / 6.35mm shaft. As a manufacturer of bicycle specific tools since 1963 you can safely rely on Park Tools\\\" many years of experience. The world\\\'s largest bike tool manufacturer is the first choice of professional and home bicycle mechanics around the world. Key Features Shop quality screwdriver. Designed for comfort and durability. Dual density grips. Heat treated vanadium tips and shafts. The most common cross head screwdriver required. Park Tool Instruction Manual Tools Buying Guide Please be aware that this item is not available on Cycle to Work Schemes.