This is attached to the top of the Jigabot EX in order to expand camera-mounting options. It allows for multiple 1/4″-20 or 3/8″-16 screws to be used to mount your camera very securely. It can also be used to mount other things, including lights or mics. This accessory is required for mounting the CounterWeight accessory. The TopMount is made of anodized aluminum so that it is both strong and light-weight.