Made of all 3/8 inch material. This brake bracket bolts to the 10 cover bolts to allow the use of a GM 8.5 10 bolt to be put into a Cadillac for stock shows where welding to the housing is prohibited. It does sit close enough to the axle tubes where the bracket can be welded to the axle tubes if rules allow. This kit comes with bracket, yoke, rotor, stainless braided hose, loaded caliper with pads, hose adapter to 3/16 inch inverted flare brake line, and all mounting hardware. Test fit bracket on housing before installation, certain castings may need to be slightly clearance with a grinder.