The manually powered PostMate T-Post Driver/Puller attaches to the side of metal fence posts (not dropped over the top), which allows for post setting and removing at the user's desired level, regardless of post height. This helps minimize both shock to the hands and damage to post or post top. Made of hardened alloy steel, the tool features an internal slide driver, which guides the post to keep it from twisting while further reducing the chance of injury to the user; and reverse hammer action, which more easily extracts from the ground the old posts.