With the Delta 3 Ball Joint Clamp from Aquatica's Technical Lighting Control line, you can join together 2 ball mounts with 1" diameters. Connect a ball base on an underwater camera tray or grip handle to a lighting arm, or connect two arm sections together. Additionally, you can use the clamp to attach a strobe or video light to the end of an arm. Built to last, the unit is made from aluminum that has been hard anodized and treated with Teflon for resistance to corrosion and other wear and tear.