DC175 C-Clamp design opens to maximum of 1.75 inches wide (44.45mm). This clamp is designed for straight or curved surfaces and has a built-in strain relief. Our clamps and brackets are compatible with all Prism LED display arm lights. Tradeshow Displays are made in many ways, with a variety of components and Prism has a wide selection of fastening brackets to suit almost every application. Not sure which bracket works for your display? Just gives us a call and we would be happy to help you with your selection.