The only problem is that the center rod exactly 1cm thick and thus they enter does not fit any known to me flash bracket system. All holders cease in 8mm diameter.
Even more ridiculous is it now that Walimex itself offers a dedicated flash bracket for a lamp stand with umbrella holder and it also does not fit there ..
Adjust does so therefore only proper studio flashes, since they usually have a larger screen diameter.
Conclusion: Great product, but returned again, very bad