Used to make picture frames. The small brackets worked great - the screws were just the right length to hold the bracket but don't go all the way through the board. The large brackets have a center hole that needs to be in the crack/joint, so I don't see a way to use them as a functional piece to hold two corners together - they can be decorative in nature. I wish I could buy more just the small braces but they come in 2 sizes.