aluminum alloy, this double socket arm features sockets at both ends that accommodate 1-inch ball bases for easy mounting and adjustability With its sturdy construction, this 15CM Double Socket Arm is sure to become an essential component of your camera setups With arm lengths of 15cm, this double socket arm flexibility in any situation Whether you are hiking, biking, or driving, this double socket arm is the perfect accessory for capturing footage This double socket arm is perfect for professional photographer or outdoor enthusiasts