From Kevin Kelly’s Cool Tools:

The small size and stubby shape of this cheap driver allows me to reach tight spaces and still apply considerable torque. I’ve used it to adjust tension on folding knives and my SOG PowerLock multi-tool, and to open cases on remote controls, my PDA and cell phones. I have a set of jeweler’s screwdrivers, Wiha Precision Tech screwdrivers and a Craftsman All-in-One screwdriver (overall length: 8.75 inches) with captive bits that store in the handle. The 2.5-inch Teeny Turner fits easily in a pocket; it’s made of aircraft alloy shank, has a magnetic bit holder and the included bits (Phillips 00, Phillips 0, Torx 5,6 & 8, Flat 2mm and 3mm) are generally smaller and much easier to change out than my Craftsman. One small negative is the Teeny Turner has one more bit than storage positions, so you have to choose the least pointy bit to keep in the drive shaft if you carry it in your pocket. That said, the portability really is key. Plus, I do like the name. — Chris Jacobs

Teeny Turner: Pocket-size driver