Hospitality Bed Hook-On Steel Bed Side Rails, Twin/Full Versatile: Dependable support for Twin and Full Size Sturdy Construction: 2" x 1-1/2" (vertical) x 76" 12 GA. side rails Sta-Tite Wires: Crossing wires provide slatless support. Width is adjustable from 37.50" - 54.25" (please see "Overall Dimensions" illustration under pictures). Features Industry Standard Double-Claw Hooks with 2" Centers