An Alli Clamp is an all-purpose steel spring clamp with a baby 5/8inch (16mm) receiver to accept any baby 5/8inch (16mm) stud. The jaw packs quite a bite and opens from 0.2 to 1.6inches (5-40mm). This is the perfect accessory to hold a fill card or flag. Steel and aluminum construction. Available in powder coated black or stainless steel finish.