That unusual long-handled tool is an old brush axe, also called a brush hook or bush hook. It was designed for clearing dense vegetation long before powered trimmers and brush cutters became common. Farmers, forestry workers, and road crews used tools like this to cut through thorny bushes, vines, weeds, and small saplings. The U.S. Forest Service still describes the brush axe as an effective tool for clearing heavy brush and young trees.
The curved steel blade is what makes it look so unusual. Its sharpened inner edge could slice through stems with a sweeping motion, while the hooked end helped catch vegetation and pull cut branches out of the way. Unlike a normal axe, it wasn’t intended for chopping down large trees or splitting logs. Instead, it worked more like a heavy-duty machete mounted on an axe handle.