What size Phillips does the Park Tool SD-2 Screwdriver fit?

The Park Tool SD-2 Phillips Screwdriver is a #2 Phillips driver sized for the medium fasteners found throughout bicycle assemblies: water bottle cage bolts, brake caliper mounting hardware, cable pinch bolts, and various accessory screws that demand a proper-fitting driver to avoid rounding. Machined from chrome vanadium steel, the tip is precision-ground to engage #2 Phillips heads with full contact and minimal cam-out tendency.

The ergonomic handle provides a comfortable, controlled grip that gives you the tactile feedback to apply appropriate torque without guessing. It is a tool that sounds unremarkable until you've stripped a soft bolt using an undersized or worn driver. After that, the right fit matters permanently. The SD-2 delivers that fit for the #2 fasteners you'll encounter on nearly every bike.