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Phillips screwdrivers; Torx screwdrivers; Hex screwdrivers; Robertson screwdrivers Flathead screwdrivers are used for screws with a single slot, while Phillips

If you use a Robertson screwdriver, it grips those screws Breakers, especially SquareD Homeline, are usually slottedrobertson only  Robertson drive flathead wood screws Size 8, 2 inch long The best woodworking screws you will ever use See why at

naga777 slot login ROBERTSON SCREW APPLICATION FILED OCT 24, 1907 Patentd Nov 8; 1910 ' UNITED STATES PATENT OFFICE  One thing The History Guy left out is that practitioners of a brand new industry preferred Robertson screws