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| These corkscrews are based on the principle that a relatively effortless turn of a handle, acting like a nut, can exert considerable axial force on a bolt or a screw. |
| In Single Action corkscrews, continuous turning of the handle inserts the worm and extracts the cork. | ![]() |
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In Double Action corkscrews, clockwise turns of a handle insert the worm, but either a second handle or a counter clockwise rotation extracts the cork. |