French-style frameless clips. A quick way to make cheap frameless frames.
Open with levers or two suitable coins and clamp over the glass / picture / backing board sandwich.
Total thickness of sandwich: minimum 2.6mm, maximum 3.8mm. 3mm long, silver finish.
Always smooth the sharp edges of the glass - a Telum pad is ideal. You can also use styrene or acrylic glazing.
Hang the picture with a cord through the clips. Or insert a 'Ring & Clip' through a hole in the backing board.