A support apparatus comprising: a support member having at least one thread; a collar attached to the support member, the collar moveable along the at least one thread of the support member; at least one arm assembly attached to or positioned on the collar, the at least one arm assembly comprised of a first arm assembly having a first linkage that is pivotally attached to a second linkage and a third linkage (25, 147) pivotally attached to the second linkage, the first linkage being attached to or positioned on the collar, the third linkage (25 147) being also attached to a mounting plate configured to hold a display device; and characterised by; a friction adjustment mechanism attached to the at least one arm assembly and comprising: a moveable lobe; a fixed lobe, the third linkage being positioned between the moveable lobe and the fixed lobe, the fixed lobe attached to the mounting plate, and having a first surface that engages a first surface of the third linkage, and the moveable lobe having a first surface that engages a second surface of the third linkage, the first surface of the third linkage being opposite the second surface of the third linkage; the friction adjustment mechanism further comprising an axle extending through an opening in the fixed lobe and an opening of the third linkage, the axle having an opening sized and configured to receive a rotatable member such that the rotatable member is moveable relative to the axle; the rotatable member extending through an opening formed in the moveable lobe, the opening formed in the third linkage, and through the opening formed in the fixed lobe, and being moveable relative to the moveable lobe, the fixed lobe and the third linkage, such that movement of the rotatable member adjusts an amount of friction created from relative movement between the moveable lobe, the third linkage and the fixed lobe. a support member having at least one thread; a collar attached to the support member, the collar moveable along the at least one thread of the support member; at least one arm assembly attached to or positioned on the collar, the at least one arm assembly comprised of a first arm assembly having a first linkage that is pivotally attached to a second linkage and a third linkage (25, 147) pivotally attached to the second linkage, the first linkage being attached to or positioned on the collar, the third linkage (25 147) being also attached to a mounting plate configured to hold a display device; and characterised by; a friction adjustment mechanism attached to the at least one arm assembly and comprising: a moveable lobe; a fixed lobe, the third linkage being positioned between the moveable lobe and the fixed lobe, the fixed lobe attached to the mounting plate, and having a first surface that engages a first surface of the third linkage, and the moveable lobe having a first surface that engages a second surface of the third linkage, the first surface of the third linkage being opposite the second surface of the third linkage; the friction adjustment mechanism further comprising an axle extending through an opening in the fixed lobe and an opening of the third linkage, the axle having an opening sized and configured to receive a rotatable member such that the rotatable member is moveable relative to the axle; the rotatable member extending through an opening formed in the moveable lobe, the opening formed in the third linkage, and through the opening formed in the fixed lobe, and being moveable relative to the moveable lobe, the fixed lobe and the third linkage, such that movement of the rotatable member adjusts an amount of friction created from relative movement between the moveable lobe, the third linkage and the fixed lobe.