A wingnut, wing nut or butterfly nut is a type of with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools. A similar fastener with a male thread is known as a wing screw or a wing bolt. [pdf]
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A drifter drill, sometimes called a rock drill, is a tool used in and to into . Rock drills are used for making holes for placing or other explosives in , and holes for quarrying. While a rock drill may be as simple as a specialized form of chisel, it may als. [pdf]
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