Designed for LX Desk Arms: Upgrade an LX Desk Arm Tall Pole, LX Dual Side-by-Side Arm or LX Dual Stacking Arm with a grommet mount to seamlessly mount your monitor arm to a desktop Everything you need: Includes grommet plate, bolt, wing nut, cable ties and assembly tool; grommet mount attaches through a surface hole 0.3 to 2 inches wide and desks up to 3 inches thick Workstation flexibility: Install your monitor arm at any location on your desk through a suitable grommet hole Elegant look: Add a sleek look to your workspace by using a grommet mount instead of a desk clamp; edgeless design means no backplates drop below the worksurface, ideal for standing desks and desks positioned in open spaces Built to last: Extensive quality testing ensures your grommet accessory holds up to everyday wear-and-tear; Ergotron products set the standard for quality with a 10-year warranty and expert technical support