This clip worked exactly as I expected. There are no instructions, so it takes a little intuition and practice. Each of the corner brackets has 2 tabs into which the tape is inserted. I use them for small boxes and did a few trial runs before gluing for the first time. I've seen questions about how small it will be with no good answers, so I'll try. I used on 6"x6" boxes. The smallest I might choose is determined by the width of the main body of the clamp, which is 3 inches, plus the width of the two angle brackets, about 2 inches. So it looks like the smallest box/frame is 5 inches on the clamp side. the vertical side is defined with just two angle brackets, 2β. Thus, when using angle brackets, the size can be reduced to 5x2". When used without angle brackets, it appears slightly smaller, like 3x3, 3x2, and the equivalent for elements without 90 degrees.