Known as a Broncolor adapter, the Manfrotto 192 5/8″ (16mm) Male Adapter – 5/8-3/8″ (16-9.5mm) is an easy way to adapt a standard 5/8″ receiver (on a stand or clamp, for example), to use lights or accessories with a 3/8″ receiver. The 3/8″ side of this adapter is notched to facilitate use of a locking thumb screw.