CD40 Arca-Swiss Compatible Back-to-Back QR Clamps L-Bracket for Nikon Camera20 5-Year Warranty

5-Year Warranty

and allow access to the male threads on top

check your Profoto Knob if it uses the smaller M8 Thread as seen in the second photo above

Center Column: 15-inch travel

C40 & C60 Arca Type Clamps

CD40 Arca-Swiss Compatible Back-to-Back QR Clamps L-Bracket for Nikon Camera20 5-Year WarrantyFor sale are Arca Swiss compatible clamps, back to back mounted at either 90 or 180 degrees as seen in pictures. This action includes two 40mm wide clamps. Hard coated black anodized surface Nickel chrome plated insert, this ensures that threads will remain in good condition almost indefinitely, as opposed to all other designs that have threads cut directly in the aluminum body of the clamp, rending it useless once the threads wear out in the