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Finally found screws that actually fit my 7 lb counterweight setup without stripping. The aluminum knob gives a solid grip even when my fingers are a bit sweaty, and they thread in smooth every time.

The aluminum knob on these screws gives a nice tactile feel when tightening, much better than plastic alternatives. I'm using the 11 lb version for my monitor arm and the threads catch smoothly every time.

I've been using these thumb screws to mount a 7 lb counterweight on my camera slider and they hold perfectly without slipping. The aluminum knob gives just enough grip to tighten by hand without needing a tool.