4-in-1 Rotary AttachmentThis rotary attachment is specially designed for the EM Smart Dual & AXI laser engraver. With it, you can easily engrave on all kinds of shapesround, curved, or uneven items. It comes with three useful modules, so you can work with cups, bottles, rings, and more. No matter the materialmetal, glass, or plasticyoull get smooth and accurate results. One tool, endless engraving possibilities.