This Review Title is Poor quality control and the content is: Worked well, but two out of the three had pieces of the metal guard that were raised and scratched my skin. I had to take some time to push the guards back down so they did not cut me. After that, these were effective. In the end, just not worth the poor quality to me..There are other information for this review, one is This reviewer did purchase it and the other is 0 people think this review is helpful.