The case is the big problem.  The case I received was either older or mis-manufactured.  Despite great effort and careful use of a razor knife, I was finally able to get the case open without damaging the case too much and not damage the Super Glue tubes inside.  When I tried to open the case the second time, it was almost as difficult to open.  I like having 10 tubes of Super Glue on hand at one time, but in a case this difficult to open is not welcome.