the DWS31-01 Gas Spring Sit-Stand Desk Converter offers effortless height adjustment that encourages increased movement from sitting to standing resulting in a more productive and active work environment. A squeeze lever adjusts the height in a snap and a locking mechanism provides a firm and steady work surface when in the lowest position. the two-tier design creates an ergonomic platform with room for a keyboard, mouse, monitor and other material. Surface area includes slots that are perfect for cups, glasses and other small items!Anti-skid silicone pads protect the surface from scratches. All combined a desktop converter that's been designed with the user in mind!