I looked at quite a few reviews of spring bar tools and saw that many of them were reviewed as flimsy.  I'm glad I wound up purchasing this one as it seems to be a high quality piece.  The metal is sturdy and the attachments fit securely.  Given the low price/high quality I'd very much recommend this if you are looking for a spring bar tool.  On an unrelated note, Vostok Komandirskies are easy to overwind.