From Manufacturer
With a silver machined finish, the Kupo 40" Hex Grip Arm with Big Handle has a 2-1/2" grip head mounted on the end of a 40" piece of steel tubing, which is 5/8" (16mm) in diameter. The surface of the tubing is machined to create a rough texture to ensure a non-slippery surface. The 2-1/2" grip head consists of a pair of rotating aluminum discs attached to a 5/8" (16 mm) receiver. The discs have 4 different sized V-shaped jaws to accept any accessory with a 5/8, 1/2, 3/8, or 1/4" mounting stud or tubing.
The V-shaped jaws feature teeth that securely grab whatever is mounted between the plates securely. The 2-1/2" grip head features an oversized ergonomic T-handle and dedicated roller bearings designed for maximum torque. At the end of the 40" grip arm, you will find a baby hex-pin with 6 milled flat surfaces.
You can mount your light fixtures or accessories on the end of your grip arm like a mini boom. They won't rotate due to the set-screw of that fixture or accessory, locking onto one of the sides of the hex-pin. The grip head uses a non-slip aluminum friction disc that maintains its durability over time, offering the user positive locking strength and precise control. The grip head is constructed around a solid steel central bolt with a fixed solid pin to secure it to the aluminum casting for increased strength and durability.