The Speed Ring for Profoto from Impact features indexed flex rod holes that allow you to effortlessly mount any square, rectangular, strip, or octagonal Luxbanx softbox to Profoto Pro, Pro-B, Acute, Acute-B, ComPact, B1, B2, D1 and D2 flash heads. The ring will also fit most other brands of softbox. The sturdy all-metal ring rotates 360 degrees to facilitate orientation or to clear obstacles in tight quarters. It has 3/8"-16 taps on two sides to allow mounting directly to grip gear such as Impact's Swivel Umbrella Adapter, 3 Section Double Articulated Arm, Super Clamp, and more.