Hand crimpers are manual devices used to crimp wires, cables, and other ductile materials. These plier-like tools, also known as crimping pliers, manual crimping tools, and crimpers, join two or more pieces of metal by exerting pressure on them to deform them, forcing them to hold each other. Hand crimping tools feature crimping points in their jaws. Some tools have crimping points, or dies, that can be changed out to give the crimpers additional functions, such as cutting. Hand crimpers can be used on steel cable, electrical connections and terminations, lugs, ferrules, or plugs.