Cantilever arms are structural elements that extend horizontally and are supported at only one end. These arms are commonly used in architecture and engineering to create overhanging structures such as balconies, bridges, and awnings. The design of cantilever arms allows for a clean and minimalist look, as they eliminate the need for additional support columns or beams. Additionally, cantilever arms can provide a sense of openness and spaciousness in a space, making them a popular choice for modern and contemporary designs.