When I frame my watercolors I use a Logan Point Driver to attach the mat and backing board into the frame. I had used brads/nails at one time but it was a big hassle doing it that way. Using a point driver is as easy as using a staple gun. I feel it a great investment if you are going to frame your own work. Here is a link from Amazon http://a.co/2jIrZ6t Sometimes you can get it cheaper on Ebay.