These are a plate steel upgraded knuckle for the Meritor RF611 axle, made from a high grade T1 steel they are extremely strong and will not fatigue and crack like factory knuckles, they are also 15lb lighter than stock saving you 30Lb per axle
these are jigged and hand welded for superior craftsmanship and a perfect fit
they include 1/2" steer lugs that tie into the spindle plate also increasing strength
additional arms are available if you would like to do a tipple shear setup with a tire rod and steer ram