TheLisle Axle Nut Socket, No. 31510, is used to remove and install the hub nut on 2020, 2021, and some 2022 Silverado and Sierra 2500/3500 trucks with 11.5" and 12" dual rear wheel axle hubs. Full-floating hubs are held on with a circular nut that is engaged by the 9-pin socket for removal and installation. The 1/2" drive socket is hardened for durability with a black oxide finish. May work on other vehicles with 2.97" O.D. axle nut.