Towering 52 in. above factory floor and weighing more than 8,000 lb, Colossus Casters are designed with spring-loaded suspension system to absorb shock. Swivel construction consists of 32 and 18 in. diameter raceways flame hardened to 55-60 HRC with total of (96) 1½ in. diameter bearing balls. In addition, each caster features 8-position swivel lock for directional control, 7 in. diameter oscillating axle to accommodate uneven surfaces, and foot-operated braking system.