The screw is a glorious little invention, but damn it if they don't loosen (or worse, refuse to move) once in a while - and always at the worst time. Gerber's Daily Carry Zip Driver is a compact, streamlined tool that clips to a jacket or bag, so it's there when you need to take out a stubborn screw. At home, use it to clamp a pair of glasses or a leaking frying pan handle. At work, stealthily fix that pesky bathroom door.

Four tools in one This palm-sized rotary knob contains the four most commonly used screwdriver heads: two flat and two Phillips. Snap one in place, and a ball-lock mechanism locks it tight enough to take the oldest, rustiest screw. The quick-release clip lets you quickly slip it on and off a zipper or backpack strap, and the compact size means even hidden, barely-reach screws are in the line of sight .