Finnish inventor Heikki Kärnä started chopping wood at the age of six but eventually realized he wasn't using the best tool for the job. His Vipukirves Leveraxe twists to one side on impact, providing increased leverage to split firewood faster. [$250; vipukirves.fi]
Action-Packed Summer Trips
Race Dune Buggies, Explore Italy, Bike Yellowstone
Plus: Fighting Poachers and Oil Companies in Congo
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