Was looking for something to clamp off some fuel lines. Didnt really trust the plastic ones (not because plastic but plastic plus fuel over time may not be a good recipe for longevity). In addition the small form factor of these specific ones seemed to be more useful. Well I gave these clamps a few uses and they're great. The wing nut was pretty easy to tighten and the small form factor allowed it to fit in rather tight spaces. Just remember to lube up the threads a bit before you tighten them down to preserve the threads. But they did a great job choking off the fuel lines. No complaints what so ever. Purchase with confidence.