About this item Clear Scale : The lever has a clear cut scale, easy to read, and adjust the diameter. Premium and Reliable : The glass cutter is made of alloy steel material, which is sturdy, lightweight, and for a long time. Suction Cup : With good suction to hold the center while the cutter head scribe an exact circle. Fit for : Compasses glass cutter maximum diameter 400mm, suitable for 2-10mm flat glass. Compasses Design : Compasses design with handle, fits your palm, and provides comfortable holding. for cutting glass artwork, craft work, and household uses.