22-18 gauge nylon-insulated pin terminals. Avoid frayed wire ends. Crimp your wire into this terminal and use the pin instead of the wire to make your electrical connection. The nylon insulation provides relief from vibration that can cause the wire to fail prematurely. The nylon insulation also prevents incidental metal to metal contact that can cause shorts. Requires two crimps (terminal to wire strands, terminal to insulation of wire). Standard tools perform both crimps. For heavier usage, use a tool that performs both crimps at the same time.