Drip Depot T-Post Pin-Lock InsulatorT-post pin-lock insulators are secured to t-posts by inserting a pin through the hole of the insulator and the t-post. After inserting polywire or polytape through the insulator, an additional pin is used to secure the wire/tape in place. A fast and easy way to set up an electric perimeter. Constructed of UV-resistant polypropylene for all weather durability.