I have a few different Magic Arms now and they are insanely useful for attaching items and giving a bit more reach when needed.

For those unfamiliar, a Magic Arm is a jointed arm which can be angled and locked into position, the joints are stable to they remain in position until loosened.

This is a well manufactured/engineered item which feels solid and will probably stay in your kit for many many years and outlive cameras/etc.

I mounted a small LED panel light on this and attached it to my camera cage and it held brilliantly, but where I've really find this yo be useful is with microphone positioning. My Rode Video Mic Pro Plus usually mounted via cold shot to my camera, but here's no way to angle it, I've since used this magic arm (with 3/8" to cold shoe adaptor) so I can have more control over the angle of the mic - and it also moves the mic about 20 cm closer to my subject which is an added benefit.

I do 100% recommend these, they are so useful to have in your bag, and the clamp means that this can be mounted to a tripod leg or pretty much anything else, and the 3/8" mount is likely to be the same as any small lights you have so you can get them positioned nicely.