Features:_x000D_ _x000D_ Made of high quality material, durable and sturdy to use. _x000D_ Adjustable glass circle cutter, round knob, suction cup holds center while the cutter wheel scribes circles. _x000D_ The lever has clear-cut scales which make easy to read. _x000D_ Compasses style, comes with round knob handle that fits your hand. _x000D_ Suitable for glass drawing circle, lampblack machine, air conditioning chimney opening, etc. _x000D_ _x000D_ Specification:_x000D_ Cutting thickness: 3~12mm_x000D_ Diameter: 20cm/7.9in, 40cm/15.7in, 60cm/23.6in, 80cm/31.5in (Optional)_x000D_ _x000D_ Package List:_x000D_ 1 x Glass Cutter 1Made of high quality material, durable and sturdy to use. 2Adjustable glass circle cutter, round knob, suction cup holds center while the cutter wheel scribes circles. 3The lever has clear-cut scales which make easy to read. 4Compasses style, comes with round knob handle that fits your hand. 5Suitable for glass drawing circle, lampblack machine, air conditioning chimney opening, etc.