DIY Laser Engraving Machine GRBL1.1 2Axis 4050 Mini CNC With 0.5W 5.5W 15W. 1. - Can engrave materials :wood, plastic, paper, bamboo, horns, and some cortex (bag), cell phone plastic shell, rubber, Stamp, photosensitive chapter, sponges, paper 2. - Non-engravable materials : all metals, stones, ceramics, glass, reflective materials, transparent materials. 3. - Installation: Buyer is required to install on yourself.We'll provide you software and instructions.