GOOD FIXABILITY: Our circular glass cutter has a fixed suction cup, which can help you hold the glass firmly. Precision-pressed rubber suction cup, durable. FUEL TANK DESIGN: It adopts a fuel tank design to automatically fill oil, which is more convenient to use. High-hardness alloy cutting wheel, easy to cut. WITH CALIBRATION SCALE: can accurately adjust the size of the cutting hole. This glass circle cutter can cut precise circles. It is specially designed for enthusiasts and professional glass cutting machines. ROUND HANDLE: Its compass-style round handle fits the palm very well and is comfortable to hold. It is very suitable for cutting glass art, handicrafts and household use. EASY TO CUT: Its cutting range is a round hole with a diameter of 13.5-60cm. The scale is clear, the glass diameter is adjustable, and it is easy to cut. Note: The data are all manually measured, please allow an error of 1-3cm, due to the difference in light and display, there will be a certain color