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This one will leave them scratching thier heads if you play it straight.
You show your latest invention, a universal nut, a nut that will fit any size bolt. You unscrew it from the double ended bolt and then screw it back onto the other side which is half the diameter and it still fits perfectly.
All precision made in brass and mechanically very clever, an extra piece is included if you want to take it even further. Includes instructions and a cloth carry bag.
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