Loctek D7R Swivel Gas Spring Single LCD Arm Stand monitor Mount, Supports monitors weighing 8.8-22 lbs. Arm easily adjust to support an ergonomically correct workstation; sit more comfortably at your desk while reducing neck, eye and back strain, extend or retract monitor arm; rotate monitor to landscape or portrait mode Gas spring hovering system gracefully adjusts monitor height Aircraft-grade aluminum arm features a stylish anti-scratch surface Cable management system organizes wires for a tidy desk. Durable hardware supports clamp or grommet installation, Option 1:Clamp: For desk thickness:0.98-4.72 inch(25-120mm) Option 2:Grommet: Size of the hole:1/3 inch-2.75 inch(8.5-70mm). Table thickness:0.98-4.72 inch(25-120mm) Available VESA 75X75/100X100 and fits most 10"-34" inch monitors - check for standard VESA mounting hole dimensions on back of monitor Supports monitors weighing 8.8-22 lbs.