Do yourself a favour and buy some super glue as well.
Look lovely however sadly had the same misfortune as others where the crystal parts have fallen off. One I had opened an empty drawer and the other I literally picked the drawer up to put it in the unit and it fell on my hard tile floor. The only good thing I can say is at least it didnt smash everywhere, theres not even a mark on that part! Have noticed that there is only a tiny ring around the outside of the base holding these on so can only assume they dont use anywhere near enough glue to make these fit for purpose, have tried gorilla glue on those two myself but will either have to try and pull the others apart to do the same or wait for them to fall off before using them on my drawers.