4-1/8" 8 point locknut socketWheel bearing locknuts are easy to remove or install with these specially designed socketsSockets are made of high-strength steel; openings resist "rounding out"Can be used with an extension and torque wrench to tighten the locknut as requiredThis socket has a 3/4" square drive opening, permitting the use of an extension and torque wrench to tighten the locknut as required. Locknut removal and installation is simple, even when wide-rim wheels are involved, since a long extension may be attached to the socket to provide the necessary clearance.