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Under-Cabinet Jar Lid Opener
A 130 x 92 mm plate that screws to the underside of a kitchen cabinet with four #8/M4 wood screws (4.5 mm clearance holes, 9 mm counterbores); push a jar up into a sawtooth V-jaw and twist the jar to break the lid loose one-handed. The large 80-degree V with 7 mm teeth grips lids from about 30 to 89 mm, the small V with 4.5 mm teeth handles 12 to 50 mm bottle and sauce caps, both with 17 mm of jaw depth below the plate.
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