We ended up losing oodles of money quite of this purchase, he did not want to comment, he felt so bad about it. My husband bought two of them and when they finished (just after Christmas) there has of course opened the first package and unfortunately in depseration to do keep it damaged. Only then dawn on him that it was not good.
If you buy shaving heads and can not see the product properly, do check and check again that it is good because they are not cheap.