Now that I have tested so almost all on the market attachment parts for Flashes I'm stuck with enthusiasm with this little helper. Very solid processed, all made of aluminum. No cheap plastic. The clamping is carried out over the entire width of the flash picture and not just a small screw which presses on the side guide of the flash and unsightly depressions leaves. (Negative example Aurora Firefly softbox) I have all holders replaced by this and am very satisfied.