9.Solutions Action Camera Flat Clamp

Length 187.3 mm
Width 99.6 mm
Height 70.8 mm
Weight 770g
Primary Material Aluminium
Finish Chrome Plated
Secondary Material Stainless Steel Central Boly
Minimum Jaw Diameter 6.32 mm
Maximum Jaw Diameter 16mm

Ercole MF7012 Silver Hollywood Clamp.

Just as the name suggests, the Grip Helper is like three Grip Heads in one. Two independent grip heads sandwich a third with a fixed 16mm pin. This system allows multiple light control accessories to mount in front of fixtures without the need for numerous light stands.