PROTO Torqueplus Deep Socket, 3/8in Drive, 9/16in Opening, 12-Point

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 The TorquePlus design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners Proto Sockets are ideal for use on stubborn or damaged fasteners, and also on fasteners made from soft materials