The KUPO KG002712 monitor adapter is designed for lightweight monitors and its flat plate has mounting holes at the corners spaced 3" (75mm and 100mm) apart from each other. It features a double ball joint in the center that is locked down by an adjustable ratcheted handle and a baby 5/8" (16mm) receiver on the end with a set-screw and knob to secure it to any light stand or baby accessory.