The Single Handle Tray Package TBS7780/Grip Handle with Ball Mount Adapter (Black) from Beneath the Surface is an underwater camera tray system. The tray serves as the base of the system. It has a long slot where the camera housing bolts through, so that the housing can be moved from the left to the right to make it more comfortable to operate the camera. The tray also features a pre drilled hole for one of BTS's specially-made lanyards, which attach at the other end to a buoyancy control device / BCD to help prevent camera loss.
The black grip handle is made from a solid aluminum bar for strength and durability, and features a comfortable rubber grip. The attached ball mount adapter is used to attach an arm system to the grip, for the purpose of then attaching other accessories such as strobes or other lights.