1.HIGH QUALITY RUGGED AND DURABLE CONSTRUCTION:This underwater extension arm is made of high quality aluminum alloy, which is waterproof, rustproof and corrosion-resistant able to withstand harsh underwater environments.Carbon fiber dual ball arm provides excellent buoyancy, the extension arm for underwater photography enhances the stability of lighting and pinpoints the light, balances your camera flash lighting setup, improves the professional quality of your underwater photography and video setup. 2.MULTIPURPOSE USE : Ideal for use while diving, snorkeling and outdoors, this extension arm enhances your underwater lighting system to provide optimal positioning of your video lights, strobes or dive camera trays. Designed for versatility and durability, the aluminum alloy underwater extension arm provides a portable solution for underwater photography for underwater photographers, dive professionals, dive enthusiasts, snorkelers and spearfishermen, and is ideal for underwater lighting systems. 3.VERSATILE UNDERWATER EXTENSION ARM: 5' Underwater Extension Mounting gives your dive camera accessories better stability and the dom to adjust the optimal angle of light to get the photos, videos you want, the way to take great underwater shots Ideal underwater extension mounting arm for great underwater images. 4.EASY INSTALLATION AND COMPATIBILITY: Dual 1' ball extension arm design is lightweight making it easy to install and operate, the extension arm dual ball design is compatible with all 1' ball hole clips and can be connected to other dive accessories, provides multiple connection points allowing users to customize the settings to meet the specific needs of the shooting without hassle.