TheLisle Corporation Axle Nut Socket, 12 Pin for Dodge, No. 31520, is designed to remove and install the hub bearing retaining nut on 2019 and newer Ram 3500, 4500, and 5500 heavy duty trucks with 12" axles. The axle nut socket may work on other vehicles with a 3.125" O.D. axle nut. The circular nut is engaged by the 12-pin socket for removal and installation. The 1/2" drive socket is hardened for durability with a black oxide finish.