An Alli Clamp is an all-purpose steel spring clamp with a baby (5/8" – 16mm) receiver to accept any baby 5/8" (16mm) stud. The jaw packs quite a bite and opens from 0.2 – 1.6" (5-40mm). This is the perfect accessory to hold a fill card or flag. The G302011 has a stealthy black finish.