It is a Dogbone Rosette Arm with a M6 thumbscrew on one end. There is an Arri style rosette(31.8mm diameter) on each end for connecting cameras or accessories with Arri style rosette mount, such as Sony FS7, Red Epic, Arri style rosette handles, viewfinders or others. Material(s): Aluminum Alloy Package Includes: 1xDogbone Rosette Arm Net Weight: 102g