Specifications: Steel Wheels Only Steer Axles Only 1.25" Hole Diameter - 1/4"-5/16" Hole Depth Features: Stays On Wheels Zinc Plated To Resist Corrosion Sold In Sets of 6 Per Axle Machined from Solid Steel Bar Stock Threaded Inside for Accurate Alignment Supported Brake Drums: Arvin Meritor 53-123512-002 53-123542-002 53-123589-002 53-123608-002 53-123627-002 Gunite 9000X 9001X 9035X Conmet N/A Motor Wheel Centrifuse 90089BK 89870BK 90174BK 91265B 90600B 90137B Webb N/A