TorquePlus Thin Wall Deep Impact Sockets, 3/8 in Drive, 5/16 in Opening, 6 Point

Features: The TorquePlus internal design minimizes fastener rounding, helps to extend fastener life, and allows the user to more easily turn worn, rounded, or rusted fasteners | Proto Impact Sockets are ideal for use on stubborn or damaged fasteners, and also on fasteners made from soft materials | The TorquePlus design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners