3/8" Drive x E7 External Star Impact Socket

Features * Precise E-Star Geometry - The internal six-lobe geometry is designed for a high-torque fit that resists slipping * Made from Cr-V Steel - The chromium-vanadium socket is heat-treated to 40-47 HRC for use on impact wrenches * Corrosion-Resistant - The socket is coated with a manganese phosphate finish to resist corrosion * Two Size Markings - The size is marked with a high-visibility laser marking and a permanent stamped marking that won't rub off * Friction Ring or Detent Pin Anvils - Smooth walls inside the drive end and a detent pin hole make the bit sockets compatible with both drive tool anvil types