Specifications: Front Brake Drums 19.50"/22.50"/24.50" Wheel 22mm Wheel Studs Various Brake Drum Sizes 1.34-1.37" 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 6 Per Axle Supported Brake Drums: Arvin Meritor N/A Gunite N/A Conmet 10009920 Motor Wheel Centrifuse N/A Webb N/A