Wood River is distributed by Woodcraft. 5/8" Ball Bearing Work Rollers Set of 6. Great for outfeed tables for saws, finishing tables, assembly lines and more. Rollers have hardened steel balls rotating on 1/8" diameter internal bearings. Load rating 75 pounds. Includes mounting screws. Please look at the photos for more information. If you have any questions, please contact me before purchasing. Thank you.