Pair of Black Enamelled Hair Beak Concorde Clip Slide 13cm (5.1) by Pritties Accessories

Is the clip very strong? I have thin, medium length hair and would like to spin a bun and clip it. Think it would hold?

How do I use this clip?

Would this clip my bangs out of the way when I study? I have thick Asian hair around nose length.

Do they pull/pinch your hair?