Manfrotto 275 Mini Spring Clamp

Clamped it onto a 30mm metal pole for a quick lighting setup and it held perfectly without slipping. The spring-loaded jaws grip tight enough that I trust it with a decent weight.

I needed something to hold a lightweight extension arm steady, and this little clamp handles the 16mm mount perfectly without slipping. Even on a thinner bar, the spring mechanism grabs tight enough that I don't worry about it sagging mid-shoot.

The jaws grip my light stand’s 35mm bar with zero wobble, and the spring tension feels sturdy right out of the box. I’ve been clipping a small LED panel to a 16mm arm and it hasn’t slipped once during a two-hour shoot.