GTU FURNITURE GLIDES BED FRAME FEET LEGS SUPPORT - SOCKET INSERTS INCLUDED (2) These Glides Replace a Broken Glide or take the place of an Existing Wheel/Caster Comes with Standard Size Plastic Socket Inserts Make Moving or Shifting a bed Effortless on Wooden, Stone or Concrete Floors Perfect for Hardwood Floors that would otherwise be damaged by wheels Installation is easy