Roller Work StandsSteel stands have nonskid rubber feet and fold flat. 3BB99 roller assembly is polished and rust-resistant. No assembly required. 6NE52 features twelve 3/4" all-directional steel ball bearing rollers. Some assembly required. 6NE53 can be mounted on table or other flat surface. 18" long housing with twelve 3/4" steel ball bearing rollers. Mounting hardware included.Adjustable Roller Work Stand, Single Capacity 200 Lbs, Max Height 45 In, Min Height 24 In, Length 22 In, Width 18 In, Roller Width/Dia 18 In, Heavy Duty 14 Gauge Steel, To Move Material In Any Direction