Closed end connectors are ideal for making a simple connection of two or more wires to create a pigtail connection. The pigtail connector is a closed end, crimp on wire connector used to secure electrical connection points. The proper installation method is to connect the wires together first and then add a pigtail connector and crimp tight to provide a safe, secure and stable connection particularly in applications subject to vibration. Designed to be used with both solid and stranded wire these closed end connectors feature a tin plated seamless copper sleeve with translucent nylon insulation.