The rotary roller module can be used for cylindrical objects, such as cans, peds, mugs, cups, bottles, pipes, bowls, guitars, drums and etc. Rotating the engraving axis can increase the original engraving area, The diameter can be adjusted in 7 levels which meets the engraving needs of different angles. All-metal construction, sturdy and stable. The rubber roller with stronger friction to avoid sliding of engraved objects.