31520 Axle Nut Socket, 12 Pin for Dodge. The circular nut is engaged by the 12 pin socket for removal and installation. May work on other vehicles with 3.125″ O.D. Axle nut. Used to Remove and Install the Hub Bearing Retaining Nut On 2019 and Newer Ram 3500, 4500 and 5500 Heavy Duty Trucks with 12″ Axles.