The CTA Manufacturing 12-pin Hub/Axle Nut Socket - RAM, No. 1212, is designed to service the rear axle hub bearing retaining nut on heavy duty Ram trucks. Use with factory service procedures to assist in servicing the rear axle on HD Ram trucks. The tool services 12-pin rear hubs on 2019+ Ram 3,500, 4,500, and 5,500 models (D2, DD, DP).