The Heavy-Duty Grip Swivel from Photoflex is a 2.5" swivel head designed to support large and heavy softboxes. Its strength and durability originates from its cast aluminum construction and 2.5" diameter center disc which locks securely to hold your gear in place. The adjustable locking handle holds at a precise angle for reliable control and an integrated umbrella insert allows users to attach umbrellas as well as softboxes.