When you buy magnetic snaps, they don’t come with instructions! So you either have to figure out how they work (not easy), ask someone who’s used them before, or go to your friend Google and ask it!
I’ve now used magnetic snaps on a couple of tote bags I’ve made. The internet resources I found most useful in perfecting *my* technique (which uses a combination of the techniques from the sites below) were these:
- http://www.helloknitty.com/pdfs/MagneticSnap.pdf (PDF)
If you’re using ordinary snaps (not the magnetic ones), here’s a tutorial on how to put them together: http://www.gold-fingers.co.cc/2011/05/tutorial-putting-snaps-on-sewing.html