The Manfrotto 635 Quick Action Super Clamp is the classic Super Clamp with an improved handle, and it has the ability to quickly release its jaws without loosening the lock knob.
The jaws clamp firmly on round or square surfaces, from .5 to 2.1 inches thick.
Accepts all regular Super Clamp snap-in pins, hooks and studs.
On Aug-07-18 at 13:27:14 PDT, seller added the following information: