Heavy duty machined aluminum alloy crabs clamp with 13-48mm opening and 1 / 4 " 20 threaded hole securely mounts cameras / lights to pipes, railings, or tables ( 3kg payload capacity Perfect for outdoor filming, tabletop product photography, or studio lighting setups where temporary secure attachment to irregular surfaces is required Features double materials construction ( aircraft grade aluminum + iron) with precisions engraving for enhanced grip strength and durability in professional photography environments portable 76g design enables effortless integration into camera bags while maintaining professional clamping for tripod accessories and stabilizer systems Ideal for content creators, vloggers, and studio photographers needing versatile mounting solution for DSLRs, rings lights, or smartphone rigs during mobile shoots