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One advantage over the Phillips drive is that one driver or bit fits all screw sizes. It is often found in marine hardware and requires a Frearson screwdriver or bit to work properly. The tool recess is a perfect, sharp cross, allowing for higher applied torque, unlike the rounded, tapered Phillips head, which can cam out at high torque. It was ...
Screwdriver bits in different sizes for Robertson screws. When Henry Ford tried the Robertson screws, he found that they saved considerable time in Model T production. When Robertson refused to license the design, Ford realized that the supply of screws would not be guaranteed, and chose to limit their use to his Canadian division. [4] [5] [6]
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I have a couple of Phillips-style screwdriver bits labelled P0R, P1R, P2R, et cetera, and so I tried to find out what they are. I can't find a really usable reference, so I can't put this into the main article, but it seems that they are "reduced shank" bits - appears to be the same tip geometry as Phillips, but with a slimmer shank.
Wera Tools is a global tool manufacturer. [15] [16] Its global headquarters and European sales team is based in Wuppertal, Germany.Wera has wholly owned regional subsidiaries, for example in the United Kingdom (based in Chesterfield, Derbyshire, England) and North America (based in Ontario, Canada), where it is known as Wera Tools Inc. Outside these areas, the company operates through a ...
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