Framelok 角落支撐架

I was skeptical these would make much difference, but my corners haven't budged since I tacked them on. They use the same thumbtacks that came with my stretcher bars, so there was nothing extra to buy.

My canvas finally stays perfectly square while I stitch, and the thumbtacks from my stretcher bars fit snugly into these brackets. They’re a simple fix that makes a noticeable difference in keeping the tension even.

These little brackets slid right into the corners of my stretcher bars and the tacks held them snug. My canvas has stayed perfectly square through a whole project, no more wonky edges. Wish I'd grabbed these years ago.