1[Metal Edge Roller] Perfect for creating bends on various metals, such as aluminum, copper, and steel. Bend the metal plate from 0.01 to 0.04 inch (0.3 to 1.0mm) at 0 to 90 degree angle, recommended folding height is 1/2 to 5 inch (13 to 130mm). 2[High Speed Steel Roller] Made from high speed steel, the rollers ensure long lasting performance and can withstand heavy use. Ideal for both DIY enthusiasts and professional metalworkers. 3[Aluminum Alloy Handle] The smoothly aluminum alloy handle of this edge bender makes it easy to handle and maneuver, the ergonomic design provides comfort during extended use, reducing fatigue. 4[Professional Tool] This metal bending tool allows for more stable and uniform bending. Achieve smoothly and professional look effortlessly. 5[Wide Range of Applications] Suitable for making metal roofings for houses, factories, etc. This edge roller tool is a must have for any metalworking project.