THanks for the quick response BCB. I am probably more confused now though… The coupler on my trailer looks like the one listed out in the drum brake parts section. But, the front axle most certainly has disc brakes. The rotor appears to be integral with the hub. The pads I pulled out of the calipers look like the actual friction material of the outside pads are held onto the metal backing with 2 screws. The inners also come off of the metal portion, but no fasteners hold it on. The calipers are held together with (4) 3/8″ hex head cap screws and nuts. The outboard portion of the caliper has hex head recesses in the housing to hold the bolt stationary while tightening. I suppose it is possible they are not the factory brakes??Thanks,Bill