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 may be small but it packs quite a bite and opens from 0.2 ? 1.4" (5-35mm). This is the perfect accessory to hold a fill card or flag. The G301712 has a stealthy black finish</p>