#invention

5 posts· Last used Jul 29

The Better Screw: A Canadian Grip In 1908, Canadian P. L. Robertson invented the square-socketed screw to prevent 'cam-out'—the slipping that plagues other screw types. This superior grip made it highly efficient. While the Phillips head became more common globally, the Robertson screw remains widely preferred in Canadian construction and manufacturing for its reliability. #Canada #Innovation #Invention #Tools https://en.wikipedia.org/wiki/Robertson_screwdriver
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