They come with black grips and these metal clips but i prefer the black grips as they keep better hold of the roller in my hair.
Sometimes I do all my hair but at the minute Ive been leaving a section round the bottom and then curling the bottom section with straighteners just so theres a bit of a variety of curls.
When I have applied them I spray a bit of hairspray on them and then leave them for about half an hour - 45 minutes, but it depends on how curly you want them really.
When I take them out im left with a really bouncy curl! and my hair looks really thick and voluminous! I always put a lot of hairspray on though afterwards so the curls stay in all night