👍The Metal Double Socket Arm is made of aluminum alloy for long service life in a variety of harsh outdoor high-impact and high-vibration environments. | 👍The 5.91" length ball mount arm can be attached to other mount accessories such as suction cups, clamps, and drilling bases to extend the length of the reachable device and flexibly rotate it at an angle to accommodate different usage scenarios. | 👍Both ends of the extension arm can be clamped to any 1"/25mm ball joint, giving you the freedom to mix and match your unique equipment mount to meet your work and life needs. | 👍Simply turn the knob on the side of the arm and the ends of the arm clamp tightly around the ball joint - make you mount simple, quick, firm and reassuring.