OTC's 1947A Lug Nut/Stud Socket for select import trucks equipped with Budd wheels features a dual pattern design - 41 millimeter hex socket for lug nuts, and a 21 millimeter square for studs - allowing one socket to do two jobs. 1 inch square drive. Can be used with standard hand tools or impact tools. Rugged construction ensures reliable long-term service. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.