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.
2. Grab the broken knob and pull it from the door. Depending on the manufacturer, the spindle may pull from the latch or slide off the spindle. Use the screwdriver to push the opposite side of the doorknob from the door and latch.. Look along the throat of your broken doorknob for a small set screw or a small slit. Use a small hex key to loosen the setscrew, or insert a small flat-head screwdriver into the slit to release the knob.