Review on 🔧 Efficiently Tackle Derailleur Adjustments with Park Tool DSD-2 JIS Derailleur Screwdriver by Robert Hardin

This is a Japanese Industrial Standard (JIS) screwdriver. It's not the same as Phillips. A standard Phillips screwdriver has a less steep angle and cannot fully penetrate the JIS screw, making it more likely to pop out and snap off the screw head. Danger of damaging the screws in this way. If you work with other people's bikes, you'll want to invest in a JIS driver. You definitely pay more for the Park Tool logo on this one, but it's solidly built and will last a very long time.