do not workdo not buy [SEP] i bought these with high hopes of not having to dig my fingers to the back of my mouth to remove my aligners those were false hopes unfortunately these things do not latch onto the aligners at all and when they do they do not hold tight enough to remove anything i ended up using my fingers anywayand of course by the time you figure out they do not work you have had them in your mouth and cannot returnso for your own benefit i saydo not buy just use your fingersthese things are just a pointless gimmick and way too expensive for the tiny pieces of plastic they are anyway