3/8 " Drive, 5/16" SAE, Socket, 12 Points, Chrome, 5/16 in

Manufactured with Four Detent Holes so that the Pin Detent Will Engage Correctly Regardless of the Direction the Socket is Placed on the Square Drive; The Positive Control System Requires a Separate Tool to Attach or Remove the Socket, Meaning it Cannot be Removed Without Specific Intent; Ideal for Use On Stubborn or Damaged Fasteners, and also on Fasteners Made from Soft Materials; The TorquePlus(TM) Design is a High Performance Drive Configuration Which Allows for Quick and Easy Socket Engagement to the Fastener Flats, not the Corners; The TorquePlus(TM) Configuration Employs a Radius-Corner Design, Shifting Contact Area and Stress Away from the Fastener Corners and Distributing Contact Stresses Over a Large Area of the Socket, Minimizing Slippage; The TorquePlus(TM) Internal Design Minimizes Fastener Rounding, Helps to Extend Fastener Life, and Allows the User to More Easily Turn Worn, Rounded, or Rusted Fasteners