Promaster 4173 Speed Ring (speedotron)

Finally got this to mount my softbox and it locks in perfectly with no wobble. The two-piece design is exactly what I needed, and the inner ring fits my flash head snugly without any adapter fuss. Set up took less than a minute, which is more than I can say for my old rig.

I bought this set to replace a broken adapter ring, and the outer ring clicked into my softbox perfectly on the first try. The two-piece design is much easier to swap between flashes than my old one-piece system.

The aluminum inner ring feels sturdy and locks onto my flash head with satisfying precision. Setup took maybe two minutes total, and now my softbox stays put without any sagging.