6 punch diameters ranging from 2 to 4.5mm (2mm,2.5mm,3mm,3.5mm, 4mm and 4.5mm), from small to large for easy identification. Adjust the screw next to the wheel to adjust the rotation tightness.` Ergonomic design to save energy and practical design intention double lever; Ideal for long, repetitive work without causing sore hands or blisters because the handles are cushioned and non-slip. Quality material, heavy duty carbon steel body, bi-material soft-grip handle, increase the thickness of pure copper gasket. High hardness and durability. Multi-function, It is commonly used for punching holes in leather, belts, plastic, rubber, canvas, fabric, cardboard, saddles, and similar materials, especially useful as a leather hole punch.