The Barnes 4WD Pro Series Jeep JK Dana 44 and Dana 30 Front Axle Trusses are made from a combination of 1/4" and 3/16" Ultra 100 steel to keep them light but incredibly strong. This truss is made to be a precise fit to the Jeep JK Front Dana 44 Rubicon or the standard JK Front Dana 30. These trusses are made to span the full length of your housing to prevent bent or broken axle tubes.