These are RealTruck SUPERLIFT SUSPENSION's replacement radius arms for 2005-2022 Ford F-250 and F350 Super Duty 4WD Designed to work on lift height 2-8”. Fabricated out of 2.00” OD x 0.156” wall DOM tubing & from 0.025-inch metal that is CNC formed for precise fitment. RealTruck SUPERLIFT SUSPENSION's radius arms are offset to the inside allowing additional clearance for wider tires. RealTruck SUPERLIFT SUSPENSION's radius arms maximize ground clearance & are designed with huge 3.250-inch press fit OEM style Clevite bushings for their superior damping and durability. At the axle mount, an integrated eccentric cradle allows adjustment to dial in the correct caster angle (eccentric cam bolts included). The protective E-coat finish resist corrosion from the on & off-road elements.