Clamp your artwork to tables or desks up to 1 3/4-inch thick with Alvin's Table Mount Easel. The angle-adjustment knob keeps canvases from bumping into the table and allows them to be positioned at any angle from 0 to 90 degrees. Extend the easel up to 33 inches and hold canvases that are as tall as 28 inches and as thick as 7/8 inches.