Set of 2 steering axles. ZF tractor axles. Lightweight, strong, next generation of axles you will be seeing on extreme rigs. These have 7300 miles on them, in excellent condition, and come with all the factory hydraulics, etc. to set your 4x4 up with 4 wheel steer. This is not a kit or aftermarket, this is an original HD factory 4 wheel steer setup. Selectable for front steer only, 4 wheel steer where rears follow fronts, or rears go opposites of fronts. You can literaly spin on the wheelbase, or go sideways. These are the exact same axles Case uses in the Series 2 backhoes for the front axle. Go to the bottom for pics and an explaination: http://www.truckworld.com/Monster-Trucks/Monsters-Monthly/2000-may/monster-tech1.html $4000 for complete setup.