Check the listing for details. Pentagon Socket 1/2" Drive 19mm 5 Point Socket 2" Long Cr-MO Steel. Condition: New. Listed at 22.69 USD. The specifications of the socket are engraved on the surface and are clearly visible.The pentagonal socket is made of chromium-molybdenum steel, which has high hardness, good toughness and strong wear resistance. The surface is blackened, which has excellent corrosion resistance and can effectively prevent rust, thereby extending the service life of the tool.The pentagonal design inside the impact sleeve provides a better fit for screws or nuts, making tightening easier and providing a firm grip even in high-torque applications, thus achieving maximum torque and control and preventing deformation and slippage.5-point sockets are widely used for loosening and tightening pentagram nuts and bolts of various structural fasteners, and can be used with electric or hydraulic impact wrenches.