The Manfrotto 035 Super Clamp is an incredibly versatile item for lighting or general photo applications, accepting a wide range of arms, hooks, brackets, adaptors and heads. Its jaws which will grip anything from 13mm to 55mm, and the supplied wedge to squares them off for mounting on flat surfaces. The 16mm hexagonal socket has a secondary lock to retain an item even if the main screw has come undone. Weight 0.41kg. Max load 15kg.