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. Remove the trim on door handles by unscrewing it around the base of the door handle. Alternatively, if you are working with a handle-and-lock combination that doesn't unscrew but instead is latched on, pop off the trim to access the screws holding the door handle in place, using a flathead screwdriver. It's difficult to see within the housing, so if you can't locate the pressure tabs just push slowly and gently and eventually the lock cylinder will pop out the other side. 2  Lock cylinders within door handles/knobs can be pushed out in a similar fashion after you remove the door handle trim and the door knob/handle.