Designed by Farmers for Farmers from the ground up to be the last t-post insulator you will ever need! Specifically designed for use with ALL 1.25/1.33 lb standard t-posts. With its 6 position 360° mounting options and ability to make tight 180° turns working as well in-line as it does as a corner insulator, your imagination is the only limit when designing your fields. Fits dual strand, high tensile and Poly rope, poly wire, Barbed Wire (Single and dual strand) up to 1/4". Easy "Weave-In" wire installation. Rounded to reduce drag. Intuitive 1-piece design with - No Pins to Lose . Arc Resistant Design. Molded from UV-stabilized, high-density polyethylene. Made in the USA (Patent Pending).