Mark Williams manufactures a full line of weld on housing ends. All housing ends are CNC machined from 4130 heat treated forgings and are designed to butt weld to the housing tube and match the bolt patterns of most popular brake assemblies. Most housing ends are 2" long and have provisions for inboard seals that eliminate possible gear oil leakage through the axle bearings. This extra length also reduces distortion problems of the the bearing bore from final welding.