Zero stars when I first opened the box which didn't arrive on time and inspected the clips I wasn't impressed and I was pretty sure I could split the clamp in half by hand. I started my project by attaching all the brackets to create a square frame and started threshing. The brackets quickly lost their hold. I then just used a clamp to nail the pieces (small 2x4 halves, I saw each maybe an inch square and 12 inches long) into an "L". I started driving a nail the impact of which broke my staple in half, I looked at the halves of the staple to make sure my hammer didn't hit them and found no fraying. These are very cheap and very fragile clips and I will be returning them and buying branded clips from the store.