The Cal-Van Tools 1/2" Drive 12-Pin Rear Axle Hub Nut Socket, No. 83970, removes and installs rear axle retaining nuts on Dodge Ram HD trucks. It fits rear hubs on Ram 2019 and up 3500 dual rear-wheel trucks and 4500 and 5500 chassis cab trucks. The socket replaces OEM Tool #2066600030 and has a 1/2″ female drive for use with ratchets, breaker bars, and torque wrenches.