Tekton 3/4 inch drive impact sockets have two size markings: a high-visibility laser marking and a permanent stamped marking. While the overall socket is standard length, the interior well extends fully into the socket, which allows for better fastener engagement in more situations. Sockets work with through-hole, friction ring, and detent pin anvils. The ring groove supports use with retaining rings, the smooth walls support use with friction ring anvils, and the through holes support use with pins. Radiused corners prevent fastener round-off by applying force to a fastener's flat sides, rather than its corners. All of our 3/4 inch drive sockets, extensions, adapters, and reducers are made out of 4140 steel and have a corrosion-resistant manganese phosphate coating.