Square version mounts from underneath into a 5 1/4" square cutout. Preferred tabletop thickness is 1/8" to 3/4". Can accommodate two to four users with access to power, data and voice. Standard configuration is two duplex outlets rated 15A/125VAC and two data plates with one RJ11 Category 3 and one RJ45 Category 6 module each. Many data modules can be installed.