1. Finish:Bright zinc plating. 2. Swivel:Double ball bearing raceways for extra strength. 3. Riveted King Pin: 5/8" dia. 4. Construction:Formed from 1/4" thick steel for extra strength. 5. Grease Fittings: Provided in swivel raceway and wheel bearings. 6. Axle: 1/2" dia. bolt with zerk and lock nut. 7. Brake+Lock: Top Lock Brake and Swivel Lock available for swivel. 8. Fork Leg Spacing: 2-1/2" 9.Optional heat treated raceways and top plate.