This kit includes one pair of 9' x 1-3/4' brake drums with 5 mounting holes on a 4.5' diameter circle...and one pair of 28T axle shafts with mating 5-lug bolt pattern. Permits owners of 1979-93 Mustang/Capri vehicles with 9' rear brakes and 8.8' rear axle with 28T differential to fit 5-hole, 4.5' diameter bolt circle wheels to them.