This is the GFFM Universal Slide with 2 Clamps Features: Mount for video cameras, lights, heads up displays, and other devices. Universal slide it can be slid onto any dive equipment (masks/hats,ROV) Quickly removed by pressing the release button. Accessory Rail Pole Knuckle. The cameras, and lights are moved between divers quickly, and efficiently. The Universal Slide serves as a mount for video cameras, lights, heads up displays, and other devices. After a device is mounted to the Universal slide it can be slid onto any dive equipment (masks/hats,ROV) that has the Accessory Rail attached, and then quickly removed by pressing the release button. this feature makes it easy to use one video camera on different divers, a ROV, or mounted on the Accessory Rail Pole Knuckle. Surface support can exchange devices that have been pre mounted to the Universal Slide with out removing a diver from the water, and with no tools. This "Quick Exchange" feature is important when circumstances change during a dive and different equipment is needed, or when changing out divers. The cameras, and lights are moved between divers quickly, and efficiently. Each Accessory Rail will accept two Universal Slides.