Bearing Locknut Socket – 4-1/8 In – 6 Pt Truck wheel bearing locknut socket has 3/4″ square drive opening. Permits the use of an extension & torque wrench to tighten the locknut as required. Locknut removal & installation is simple, even when wide rim wheels are involved. A long extension may be attached to the socket to provide the necessary clearance. Socket is made of high-strength steel. Opening resists «rounding out.» This item is a 3 pack of the base item OTC-1915.