Bear Grylls Survival Hatchet A compact survival hatchet is worth its weight in lifesaving warmth and shelter. Especially when it weighs in at less than a liter of water, like the 1.4 pound. Bear Grylls Survival Hatchet designed by Gerber. The worse the weather gets, the more you’ll appreciate this sturdy little hatchet’s ability to turn out stacks of firewood or improvise a quick shelter. Also comes with a military grade, mildew resistant sheath with loops to attach to a belt or pack.