Finally a picture frame clamp that works, hallelujah! I bought pony clips, adjustable clips, ratchet clips, Dewalt and Irwin clips and none of them worked well on picture frames. Well, this one did. Finally. YOU MUST GET THE PLIERS SO TRY TO BUY THEM TOGETHER. The spring is so difficult to loosen (it has to be to work) that without hands, like a lumberjack or climber, you'll be searching your entire garage for something to rip it apart. I used my own Knipex pliers but this was a workaround that