Casters Improve Mobility Bed casters or bed frame wheels make the moving or shifting of beds effortless. These durable bed casters have a load capacity up to 125 pounds each. These casters come in black rubberized soft-tread wheels, with a yellow zinc finish. Rubberized Soft Tread The rubberized soft-tread is ideal for the following surfaces: hardwood, ceramic, tile, and steel. The rubberized soft-tread is less likely to scratch or indent your wooden, tile, or steel floor. The rubberized soft tread is also efficient for carpet and terrazzo surfaces. Dimensions These rug savers are designed for use with bed frames. They have a 2" x 2-1/4" Yellow Zinc Caster, with a 3/8" x 1-9/16" Grip Neck socket stem. All measurements are approximate. Plastic Plug Inserts Plastic Plug Inserts are included. These plastic inserts are made to be inserted in your bed frame to facilitate the correct fit for your casters. Sold Singly These casters are priced "each", so a quantity of 2 will yield two casters.