The Photek Grip Clamp with Stud for SB84 Sunbuster umbrella is made of lightweight cast alloy. The clamp is a very versatile tool and it holds just about anything: cameras, lights, umbrellas, hooks, shelves, plate glass, cross bars, even other grip clamps.
It can be securely mounted on any tube from 0.5" to 2.1" and is supplied with a unique wedge insert for clamping onto flat surfaces. A built-in socket allows the use many of many 5/8" attachments to hold anything from backgrounds to lighting fixtures.
A standard 5/8" (16 mm) stud and plastic wedge for flat objects are included.