Specifications: Rear Brake Drums 19.50"/22.50"/24.50" Wheel 22mm Wheel Studs Various Brake Drum Sizes 1.10" 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 For 8/10 Hole Wheels Sold In Sets of 10 Per Axle Supported Brake Drums: Arvin Meritor N/A Gunite 3922X Conmet N/A Motor Wheel Centrifuse N/A Webb 56864B (For Gunite #3922X & Webb #56864B)