Conserves work space by raising reference materials to eye level. Glare-free, polypropylene sleeves with rugged frames for heavy use. System clamps to flat surfaces up to 3 1/2" thick. Arm swivels and extends up to 12". Can be used in portrait or landscape mode. Includes 10 letter-size sleeves and 10 snap-on tabs that can be top- or side-mounted. 20 viewing sides. Frames come in assorted colors (2 each red, black, dark blue, green, yellow).