●Made of hard coat anodizing aluminium, durable to use. ●Standard clamp used to attach two arm, baase adapters and strobes together. ●A hard anodized aluminum wing nut allows for easy one-handed operation and will withstand years of use. ●This standard clamp attaches two 1-inch diameter balls. Thicker plates provide the perfect combination of strength and range of motion. Plates are spring-loaded for easy assembly and breakdown of your arm system. ●Package: 1 x clamp only