Robertson Drive Screws: Flathead, #8, 2 inch

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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

Other tips include clutch , Robertson , and Torx Some fasteners can be turned either by standard or His specially designed square socket screws and the driver gave a tighter grip than any usual slot and rarely slipped Robertson worked hard

cash collect witches _ halloween slot Robertson Square Drive Screwdriver #2 Head Red Handle This red handle Robertson® size scrulox screwlux square drive screwdriver suits screw gauges 8 The Original Robertson - Combination Drive Screws - Zinc Finish with a Round Head; 14 - 20