CNC machined in house from 1018 cold roll steel, these arms all feature 10 degree tierod end angle correction to lengthen the life of the joints. Passenger arm is two inches longer to allow extra clearance for steering linkages as well as more leverage for easier steering. Full kit includes two arms, six 9/16" high tensile studs, cone washers and lock nuts. Additional studs, nuts, and washers available for purchase separately. Single arm kit includes one passenger arm and associated hardware. Tapered for the 7/8" 18 tpi Chevy Tie Rod Ends. Can be drilled to 3/4" for an additional cost.