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. May work on other vehicles with 2.97" O.D. Axle nut. 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.