Most monitor arms are fairly simple to setup, but make sure you check the instructions that come with them. In most cases, they'll attach to to the back of your monitor with a VESA mount, which is a square arrangement of four screw holes. Different arms have different bases and mechanisms for attaching to your desk (or a wall), but in most cases the options we've chosen attach to your desk using a clamp system that doesn't require any work on the desk itself.