Each arm lifts, extends and rotates for the best view Places screens one over the other or on either side Desk clamp attaches to surface edge up to 2.6in. thick Grommet mount attaches through hole 0.31in. to 2in. wide and up to 3in. thick Streamlined look enhances your work area Durable construction keeps screens steady Built for thousands of movements by passing 10,000-cycle test Supports up to four screens with LX Arm, Extension and Collar Kit accessory (sold separately) To align monitors side by side, maximum outside width should be no more than 40in. (102cm) Most monitors with screen sizes of 40in. or less fit within this specification External integrated cable management