Nail guns are potentially lethal tools that fire nails in rapid succession at high velocity. The nail cartridges are held together with wire, plastic, glue, tape, or paper. When wire is used, the 2 carrier wires (Figure 1) are called the wire collation. As the nail is fired, these 2 wires are sheared off, leaving 2 barblike pieces of wire ( 6 mm) attached to the nail. The 2 pieces are then shea...