This layout tri-square has a rugged aluminum construction. It folds flat for easy transport and storage. The bottom edge features markings in both inches and centimeters. It also includes a carrying case. This Folding Tri-Squares is ideal for paver and tile layout, framing, and other hardscaping projects. It provides perfect 45 and 90-degree angles. This smaller square is easier to handle in tight spaces. This Aluminum Folding Tri-Square is the perfect choice for any hardscaping professional. Its lightweight, foldable design makes it easy to transport. Its rugged aluminum construction ensures it will provide years of service!