Apr. 1, 2015. TDK Corporation has announced that its Hong Kong-based HDD head manufacturing wholly owned subsidiary, SAE Magnetics (H.K.) Ltd.
You use a wrench to screw, or unscrew a bolt. A screwdriver is for screws. Either way you turn it left. Some bolts have reverse threads and would turn the other way to unbolt.
Nuts will unscrew over time, but quick releases will not. The quick release is actually stretching the rod (skewers) that runs through the hollow axle to the nut on the other side. This stretching puts a great deal of pressure on the quick release nut on the other side, which has little teeth next to the bike frame.