The Kupo Adjustable Gaffer Grip is a quick mount, multi-purpose clamp that will grab on most surfaces flat or round. Gaffer Grips reinvent the standard spring clamp by adding strength and versatility. The Adjustable Gaffer Grip has one fixed baby 5/8" (16mm) stud and one reversible baby 5/8" stud with both 1/4"-20 and 3/8"-16 threads on either side. The reversible stud is mounted in a baby 5/8" (16mm) receiver. If you're looking for a rapid, down and dirty way to mount a lighting fixture, the Gaffer Grips are always willing and able. The Adjustable Gaffer Grip's jaws can be adjusted from 0.98-2.56" (25 - 65 mm) and is clad in a stealthy black finish.