A T-post insulator that includes means to attach in a plurality of locations around the post. The insulator portion of the device consists of an outer surface that wraps around the T-post about 270 degrees for optimal insulation of the wire. The wire is installed through means of a snap in action from the top center of the wire around a retaining post. The wire is insulated fully regardless if installed on a straight run or a corner installation where wrapping around the T-post is required.