Porcelain Bull-Nose Insulators are effective end strainers for the termination of electric fence wires. They hold most types of electric fence wire and can be used on t-posts, wood posts, and metal posts. Long leakage paths to prevent arcing. Made from high-quality, fire-resistant porcelain for long life. To install, connect the support wire to the post, thread the support wire through the insulator, and tie the support wire off. Thread the fence wire through the other hole in the insulator, and tie off the end to complete the fence run.