Aluminum alloy: the double ball joint is made of aluminum alloy, which is durable Waterproof: double ball joint waterproof, strong weather resistance The double ball mounting arm is made of solid aluminum alloy, the ball joint is coated with rubber material, and the medium is connected by stainless steel Compatible: dual ball mounting arm is compatible with all hawks devices Strong flexibility: through the double ball setting, this bracket allows you to flexibly rotate the device 360 degrees