Crash, the box springs fell through the bed frame again. These sturdy steel bed support rails end such midnight surprises by sliding easily over your bed frame's sides to firmly support any weight up to a 1/2 ton. Bed rail brackets won't squeak or slide! Sized for wood or metal frames. Brown. Set of 6 made for coil or box springs; extend 3" for wood, 4" for metal frame. Wood bed rail support fits over 1"W frames.