The strength and stability of a tubular tripod base with the convenience of easy height and angle adjustments Bookplate holds three 8.5" x 11" sheets Angle adjusts for sitting or standing positions Fold out extensions hold sheets securely in place | Telescoping 3-section vertical shaft with 2 ergonomic clutches adjusts height from 20"-52" Tripod folding base folds for storage and travel 16mm Tubular legs, leg braces and non-slip rubber end caps for added strength and stability |