Highly adjustable arm moves up, down, forward and back with just a touch. Provides 12.6" of height adjustability and 25.5" extension from base. Clamp mount hardware fits desk up to 2.63" thick and grommet mount hardware fits desks up to 3" thick. Dual-Swivel Monitor Arm—Experience the productivity benefits of using two displays. Wall/Ceiling Mounts & Hardware Type: Clamp Mount Hardware/Grommet Mount Hardware; Mounting: Desk; Arm Rotation: 360°; Platform Height: 27".