Superiority: 1. Made from precision steel for ultra strength and durability. 2. Reduction gear ratio of 4:1 allows the rollers to make one complete turn for every four turns of the rolling mill handle. This relieves the amount of force needed to operate the rolling mill. 3. With forged handle, simple and convenient to use. Easily mounts the rolling mill to your workbench using the mounting holes. Application: The combination rolling mills are ideal for jewelers and crafts-people. Rolling Mills are designed for cold rolling metal to produce thinner gauges of sheet metal and wire, transferring textures to your metal and to make the thickness uniform. Feature: Combination rolling mill 110 mm 4 MM max opening Steel forged handle Solid hobbed steel gears Precision high strength housing Precision engineered for lifetime of use Product: Combination rolling mill Gear ratio: 4:1 Roller width: 110 mm Roller diameter: 55 mm Maximum opening: 0-4 mm Flat area ( /- 0.01mm): 53 mm Square wire( /- 0.01mm): 1.0, 2.0, 2.5, 3.0, 4.0, 4.5, 5.0 Ring shank - half round ellipse(mm): 2.5x1, 3x1.25, 4x1.5mm Package size: 33x33x20 cm Gross weight: 18.5 kg Package Content: 1 x Combination Rolling Mill 1 x Handle