6-Pt. Truck Wheel Bearing Lock Nut Wrench - 2-1/2” Opening Bearing Locknut Socket - 2-1/2 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.” 1921 No -