This is a Matthews Telescoping Hanger with Triple Extension. Telescoping Hangers have a very substantial pipe clamp to attach to a lighting grid. The pipe clamp has been slightly offset, to allow the riser or drop down tube to slide up when there is sufficient room between the grid and the ceiling. It is therefore possible for a 3' Single Extension hanger to be able to go from a few inches below the grid to the fully extended 3 feet.
Matthews Telescoping hangers are available in single stage and double stage. All terminate in 1/2"-13 female thread to permit the attachment of several hanging accessories listed below.
An XTA Head may be added for even greater versatility, as well as the Broken Arm and a Flag as a topper, allowing for fast versatile lighting control without the need for additional hanging hardware.