framingsupplies price $5.10
Swiss Clips (Point of sale packaging)
Spring loaded fingers hold glass, picture mat and any backing up to 30" x 30".
(Mat, Masonite, foam board) up to 3/8 " thick.
You can barely see the Swiss Clips from the front - just very small "fingers". Available in chrome.
For frames up to 30"x 30" and less than 50 pounds if JBC cord is used.