It’s a brilliant design—Robertson screws won’t easily cam out, and the socket shape helps center the screwdriver, making one-handed operation easy. A slotted, flat-head screwdriver.

but you can also secure a couple of your most-used bits directly to the screwdriver if you want. The included bits are your basic Philips, flathead, socket, Torx, and Robertson heads. There's an ...

He’s the inventor of the Robertson screwdriver—you know, the square-shaped one in your toolbox. Why he deserves to win: Before Robertson’s invention in 1908, we were stuck with the slip ...

Phillips and Robertson drivers are designated by numbers--the larger the number, the larger the tip and the heavier the screw it's designed to drive. Slot-head screwdrivers are designated by the ...

Why he’s famous: He’s the inventor of the Robertson screwdriver—you know, the square-shaped one in your toolbox. Why he deserves to win: Before Robertson’s invention in 1908, we were stuck ...

My Canada is the Robertson screwdriver. It is efficient, practical and unheralded — even in its own land. It is like the country itself. Invented in 1907 by a Canadian travelling salesman named ...

A frantic e-mail explaining the situation reached Coburn a few hours before he was scheduled to leave for London, allowing him just enough time to secure the required Robertson screwdriver.