The staples are high quality, and have the double barb, which is great for keeping them in. I will just warn people, I did have to take these back, because they were a lot bigger, and thicker gauge than I was expecting. That's kind of my bad. They would probably work well for a heavy gauge fence, with large post, but nothing with smaller post, hardware cloth or welded wire fencing.

Only one barb on each side not two like the image indicates