CPU mounts vertically or horizontally under worksurface. Adjusts vertically 17-3/4" to 22-1/2" high x 8-3/4" to 10-1/2" wide and horizontally 9" to 13-1/4" high x 17-1/4" to 20" wide. All-steel construction provides maximum security. Includes two combination locks. 20w x 12-3/4d x 22-1/2h. Shpg. wt. 11 lbs.