3M

12-10 gauge grease-filled nylon-insulated butt splice terminals. For sensitive environments where heat tools are restricted. The grease acts as a burrier to water that could short your connection. A double crimp on each wire holds the grease in place. 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.