The Beach Diving Straps with Stainless Steel for Tray System (Yellow) from Beneath the Surface are connecting straps for use with Beneath the Surface's tray systems for digital cameras. They can be used with non-BTS trays via the optional Adapter Strap #BS-ADPT-Y/B/P. Risers, the pieces that connect the arm adapters to the bridge bar, have a hole drilled in them that allows the diving straps to connect to the camera tray for easy entry through the surf.