Furniture sliders for hardwood floors

Furniture sliders for hardwood floors serve a dual purpose. On the one hand they help keep your hardwood floors from getting scratched, scuffed or damaged by the moving of furniture. On the other hand, they serve to provide easier movement of heavy furniture pieces along hardwood floors, as well as linoleum and ceramic tiles and carpeting.
Furniture sliders for hardwood floors:

Furniture sliders for hardwood floors pictured:
Top: Waxman 4710495N 2-1/2-Inch Felt Bottom Round Furniture Sliders, Oatmeal
Bottom: Waxman Reusable Sliders Furniture Moving Kit, Oatmeal