Alvin black drawing table tool caddy instrument tray helps keep your drawing or drafting tables organized. Versatile storage system keeps work surfaces clear and organized. Made from sturdy molded ABS plastic, this drafting tool storage tray has 14 compartments of various sizes and 27 slots for pencils, pens, markers. Special compartments for scissors and items up to 15" long such as rulers or brushes. Can be mounted to the left or right side of any table that accepts wood screws. Works best for tabletops between 5/8" and 3/4" thick. Requires 4" of open space under table for attachment brackets. Includes rubber feet for convenient desktop use. Overall dimensions 29"l x 7"w x 2-1/3"d. NOTE: Tools and supplies not included.