If you're looking for a way to protect your external corners, this Bailey Metal Products Limited corner bead is a great selection. It is made of metal and in an L-shape. You can install this product with nails, clinch-on tools or even screws. It is a combination of holes and a knurled face that will make adhesion easier. It measures 1 1/4 inches and 9 feet. This product is easy to install.