Durable Material: Crafted from premium steel and treated with spraying and electroplating processes, this product is designed to be impact-resistant and scratch-resistant, ensuring a long-lasting performance. Adjustable Knobs: Equipped with convenient knobs on the bottom and sides, you can easily adjust the height (0.79 inches) and rotate the lower wheel up to 90 degrees for tailored use. Versatile Use: The varying sizes of the lower wheels enable you to create dents, welds, and other shapes of different sizes and degrees, enhancing its versatility for various tasks. Effortless Operation: Shape steel and aluminum with ease by manually pushing the metal wheels back and forth, eliminating the need for electric, pneumatic, or hydraulic power. Service ：We value your shopping experience! If you have any questions, please contact us, and we will respond within 24 hours.