The Invention of the Robertson Screwdriver

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Robertson Screwdrivers Features 3 component handles provides a maximum comfort grip; Size is shown on blade and tip style is shown on handle for

Robertson drive flathead wood screws Size 8, 2 inch long The best woodworking screws you will ever use See why at  In 1908, Canadian Peter Robertson invented a square-head screw drive where the driver and the hole had a slight taper There had been other

double bubble bingo slot games Also, a true robertson screwdriver will hold a robertson screw on the tip better than a square will Share  If any one thing distinguishes Canadian home improvement from American home improvement, it is the Robertson screw