A bump cutter is a specialized tool used in concrete finishing to create control joints or decorative patterns in freshly poured concrete. It typically consists of a handle attached to a flat metal blade with a series of wheels or bumps along its edge. The bumps on the cutter imprint the concrete surface, creating grooves that control where the concrete will crack as it cures, thereby preventing random cracking and promoting structural integrity. Bump cutters are also used to add texture or decorative designs to concrete surfaces, enhancing both aesthetic appeal and functionality.