This is a support to separate the glass from the canvas and hold it in place discreetly. Designed for a 2cm frame, and a 3-4mm glass such as the paintings in the picture. Artist:Juliana Hoffmann It needs to be tested. Print 4 holders (one for each corner) Fix each one with a wood screw at the back of the canvas. You'll probably need to place the glass before fixing the last two.