Heavy Duty bed frame Casters can be used to replace lost or damaged ones. Caster stems fit standard leg sockets on most bedframes. | Casters have a smooth rolling action on carpet or hard floors. Each caster has a secure locking mechanism. | Easy to install. Remove plastic sleeve before attaching the wheel to your bed frame; pliers required. | Set of 4 replacement bed frame rollers, Heavy-duty caster with zinc finish offers superior durability. | Dimensions: 2.5"W x 2"D x 4"H, Please refer to the second picture for the detailed size data.