It is constructed of machined chrome uprights and cast metal crossbars. Solid metal for long life and stability. Features: - Chin height adjustable with a knurled knob for easy adjustment - Chin rest stop for careful positioning - Provides forehead rest for secure positioning - Flip over occluder for easy placement Comes complete with 500 chin rest papers for cleanliness. Papers are also available separately. Choice of Base to mount to a desk or double screw clamps. Dimensions: Overall height is 20 in. (52 cm), width is 9 in.(23 cm). Chin rest is adjustable from 10 3/4 in to 14 1/4 in (27.5 to 36 cm) from table top. Includes clamps that can accommodate up to a 2 in (5 cm) thick table.