Set of 4 Locking Bed Frame Casters with Sockets
2 x 2 mat finish double wheel bed frame caster with wheel lock brake. Composite plastic wheel is 20% stronger than standard plastic bed frame casters. Center tab impedes movement under heavy weight. Standard mounting stem. Plastic  mounting socket for 1/2 diameter hole included. Rated to 150 lbs per caster. Set of 4 casters and 4 sockets.