I recommend you take a sharpie and mark the sides that ...
I used these for quick releases on costumes.  Can't praise it enough!  They are extremely strong, but release with one hand.  ADORE them! When sewing them in though, I recommend you take a sharpie and mark the sides that attract to one another though if you aren't using the hooks.  You will be thankful of that if you are sewing them into things.
Rating: 5 stars