Rail length can be adjusted without tools to 37", 43" or 57" long with simple push buttons (Figure A , B)Crossbars are easy-to-install and remove Adjusts between 36" and 72" Accommodates a KING SIZE BED Comes standard Fits all home-style beds (Figure C)Easily adjusts up or down with spring-loaded release Attractive brown-vein finish Constructed of 1" steel