Specifications: Rear Brake Drums 19.50"/22.50"/24.50" Wheel 3/4" Wheel Studs Various Brake Drum Sizes 1" Hole Diameter - 1/2" Hole Depth Features: Use With Solutions "A" & Solution "C" Centers Brake Drum Holes To Stud Stays On Wheels Machined from Solid Steel Bar Stock Zinc Plated To Resist Corrosion Sold In Sets of 10 Per Axle Use On: BUDD Wheel System Stud Piloted System Ball and Seat System (Budd Drive Wheels)