- 150mm (6"). - For securing essential nut fixings. - Easy to use. - Incorporates standard pliers with the added benefit of twisting wire.  Ideal for use in motorsport and classic cars. Wire available Although primarily used in motor racing, using safety wire to secure components finds many applications in high performance and classic road cars also. Lock wire or safety wire is a type of positive locking device that prevents fasteners from loosening due to vibration as well as other forces. Safety wiring also serves as a visual indicator that the fasteners have been properly tightened. Typically, the wire is threaded through a hole drilled into a fastener or part, then twisted and anchored onto a second fastener or part, then twisted again. It's especially useful for critical areas such as suspension and brakes, but it's also very useful for securing other components, such as keeping exhaust manifold bolts, or remote oil filter mounting bolts from becoming loose.