The item in the image is a Silberschnitt 60cm glass circle cutter.
Key Specifications
Maximum Cutting Diameter: This cutter can cut circles up to 60cm (or 61cm/24 inches) in diameter.
Minimum Cutting Diameter: It can cut circles as small as 72mm (approx. 2.8 inches) in diameter.
Glass Thickness: It is designed to cut glass between 3mm and 6mm thick.
Cutting Wheel: The cutter features six steel cutting wheels for extended life.
Cutting Angle: The cutting angle is approximately 130° to 135°.
Features: It includes a suction cup to secure the center point to the glass while rotating and has grooved metric measurements on the brass-plated steel arm for easy reading.