1. Material: Stainless steel 2. Swivel: Double ball bearing with formed raceways for extra strength. 3. Dust Cover: Helps protect swivel bearings. 4. Construction: Heavy duty gauge stainless steel formed for extra strength. 5. Axle: 3/8" dia. bolt with lock nut. 6. Brake: Both Top Lock Brake and Maxi Lock Brake are available. 7. Grease seals and grease fittings standard.