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 ofβ¦