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Connects Compatible Mount Parts: This 17mm ball extension arm pairs with a 1 / 4 male screw adapter to bridge matching holder components, helping an existing mount layout without replacing the full setup Adjusts Viewing Position Easily: The articulated arm and ball joint structure make it easier to placement, refine screen direction, and adapt a compatible holder arrangement for driving, desk work, or filming Works With Matching Interface Setups: Use this accessory with compatible 17mm ball mount parts and devices or brackets that use a 1 / 4 female thread, keeping the fit description centered on visible connection points Compact Build With Practical Structure: The short extension profile adds reach without an oversized look, while the black aluminum alloy and mixed-build construction supports a clean fit for everyday mounting accessories Includes Two Ready To Use Pieces: The package contains an extension arm together with a 17mm ball to 1 / 4 male screw adapter, so buyers know the package covers adapter parts only and not the holder body or device