Not only Cylinders Creality Rotary Roller for Laser Engraver is not only designed for Cylinders. The adjustable support module can achieve engraving on irregular cylinders like yeti cups, wine glasses, and wine bottles. Note Compatible with Creality laser engraver only. Adjustable Rotary Roller By changing the 7Levels gear, it is possible to engrave the cylinders with a diameter from 5mm to 120mm Easy to Use Use LaserGRBL or LightBurn, the most popular carving software in the world and very easy to use. Also compatible with almost all laser engraving machines Using Note Modify the configuration parameters of Laser software before using the rotary roller, you need to modify the value of 101 to 60.375. After using the rotary roller, please change the value to 80. Official Guaranty All Creality products come with 24 months quality guarantee, if anything about product quality, please feel free to contact us, and we will solve that within 24 hours