I bought this arm to a flash including screen felxibel on the ceiling (!) To be able to hang. For this purpose it with flying colors. The flash (with me a 430EX) remains exactly in the position where I bend him. Even if he was very bent sideways.
When I got the part, I thought at first it was oversized for this purpose. But I've since been deceived because the subsequently ordered arm in size L holds the position only halfway upright position. Hanging it's even worse.