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.
Hold the knob of the shutoff valve in place with one wrench while you turn the bonnet nut counterclockwise with the other adjustable wrench. Try to move the valve knob after each turn. Stop turning the bonnet nut when the valve knob is loose and turns easily. Adjustable wrenches.