History of the Robertson Screwdriver

What is a Robertson screwdriver, what is the Robertson head screw history and what are the various Robertson screwdriver types?

Also, a true robertson screwdriver will hold a robertson screw on the tip better than a square will Share

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slot machine brands 2 Size Original Robertson® Scrulox Square Drive Screwdriver Robertson screwdrivers are easy to use one-handed, because the tapered square head tends to