Provide a comfortable workspace for physically-challenged employees with the Populas Knob-Adjusted Wheelchair Accessible School Desk. Adjust the height from 23 inches to 33 inches to accommodate most wheelchair sizes and styles. Tilt the desk top from 0 degrees to 50 degrees to best fit the needs of each user. A 1/2-inch lip keeps pencils and books from sliding when the surface is tilted. The book box allows you to store supplies and materials without giving up knee space.