Can a word screwdriver open a cross screw?
Generally, I usually use a test pencil can unscrew the most common equipment. A general word screwdriver can screw a slightly larger cross screw.
Screws used for screwdrivers, of course, are limited to small diameter machine screws, self tapping screws and wood screws.
From the processing point of view, the word "mouth" is mechanical processing, more than one process. The cross is formed at the same time as the head of the screw is upset.
It is conventional to open a screwdriver in one shape, but the tightening force of the screwdriver is slightly greater and it is easy to damage. The cross doubled force, much more tightening force. So now more and more intersection.
