Sold as a pair. These are USA mande 4340 axles designed to repalce the OEM axles on the r180 half-shafts. To complete assembly you will need new cv boot clamps (not boots) but hose clamps will work. These are splined like the OEM alxles, some aftermarket half-shaft assemblies use a differnet spline.

Titan Swap r180 Extended Axle Shafts