Features and Specifications:

1. 13.5" X 18 3/4" Bookplate, rolled edges for safety and strength.
2. Angle adjustment tension knobs, easy removal from upper shaft
3. Friction locking knobs, 1 3/16" center shaft, adjustments fully extend shafts from 24" (sitting position) to 45" (standing position) and anywhere in between
4. Hi-impact plastic leg housing, friction locking knobs, Leg support straps, non-slip rubber feet, variable spreading legs.