Here is the one you want if you have too much money and want the smallest, lightest, and probably best possible jack. I think it was originally designed for the military.
redridge.industries
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Redridge Industries | TacJack - 7 Ton Short
Lightweight, rugged, and performant, the Redridge Industries TacJack is the ultimate tactical jack. From battlefield to backcountry, TacJack has your back.
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