The 3336 chrome steel impact socket is crafted in accordance with the German DIN 3121 standard. For practical use, this tool is often attached to parts with square tenons, including the ratchet wrench, bent handle, connecting rod, and universal joint. This series of socket can grip the face of bolts or nuts with square head or hex head for closing or opening motion. Its primary purpose is to withstand forces applied by impact tools. To better serve that purpose, the socket is made of chrome steel instead of carbon steel for higher strength, greater toughness and reduced brittleness.