As others said, the edges are not polished.  They are abrasive.  That was fixed with a dremel and mothers polish.  The clips are very strong too.  I do not like how the credit card clip is made.  It is too flat.  It should have the arch at the top like the money side.  Then cards would be inserted easier without damage.

All in all, it holds my money and cards securely in a small amount of space.  I just have to be careful putting things in and taking things out.  A little skill for a little more comfort.  Ok with me.