I wish I had the time (and the video camera!) to do a tutorial for you, but since I have neither, fortunately some other SU! demos have done all the work for me :o)
Click HERE to watch one I found on You Tube. The Circle Scissor and Glass Mat are sold separately (you can see them on the last page of the Summer Mini Catalogue). For a real bargain, you might like to purchase my Circle Scissor Bundle...available only until the end of this month!
I have also been asked how to set grommets. They are super-easy too. No special tools required, unlike eyelets. You can see a tutorial for those HERE.
If you'd like to have a try of the grommets, without breaking the bank, you might like to join a Share. The first group is full, but I have started a second group. Shares close in 3 days!