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Magnetic screwdriver
Dowels are strong. Screws are stronger. Combine them and you have the INVIS system, a way to tighten or loosen a hidden screw without touching it. Set the red magnet next to an embedded INVIS screw, spin it with a drill (INSET) and the screw spins too, tightening itself securely to a mating bolt. About $395; INVIS -
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