Features and Benefits: 3-1/4" 6-point locknut socket; Wheel bearing locknuts are easy to remove or install with these specially designed sockets; OTC wheel bearing locknut sockets are formed from high-strength steel that is resistant to rounding out under high torque loads; Designed for use with 3/4 inch, square-drive MANUAL tools only; Includes wheel bearing locknuts which are easy to remove or install with these specially designed sockets; NOT intended for use with impact tools - use with impact tools will void the socket's warranty; 6 point, 3-1/4 inch (flat to flat) opening size with 5 inch depth; to determine socket size needed, measure locknut from flat to flat; Not Included Related Product: OTC1908 is part of OTC9850 6-pt Wheel Bearing Locknut Sockets with Tool Board; Not included Related Product: OTC1908 is included in OTC9852 Wheel Bearing Locknut Sockets / board;