This professional glass cutter is made of high quality rubber and aluminum with plated copper, environmentally co.ukiendly, durable and strong to use. Adjustable glass circle cutter, round button, suction cup holding the center while the wheel cuts. The lever has clear scales which make it easier to read. Compass style and Max. Circle Dia. of cut is 40cm. This cutting tool is perfect for hobbyists and professional glass cutters. Specification: Condition: 100% brand new Color: shown as picture Material: rubber and aluminum Total length: approx. 30cm / 11.8inch Suction cup diameter: Approx. 5.5cm / 2.2inch Lever length: approx. 20cm / 7.9 Max. Circle Diameter: Approx. 40cm / 15.7 Package weight: approx. 130g