For attaching single cedar picket fences to 2x4 treated wood skids to a custom timber fence. Used them in a Ryobi slim stapler and was very happy. My intention was to just nail the pickets and set them in place and then add the extra stainless steel screws. However, the grip was so good and firm that I decided to wait out the fall and winter to see how they hold up with natural expansion and contraction. The stainless steel staples penetrated the materials with little difficulty. So far very happy with the end result, good product.