500mw High Power Laser Expansion Kit for XY Plotter iDraw Writing Robot

500mw laser extension head for XY plotter machine. It could engrave on wood, paper, plastic, leather, cloth, chocolate, etc. 

• The laser can cause blindness. Please do not direct eyes or direct high-reflective smooth. Wear sunglasses while using engraving with the laser.
• Do not place it where children can get it. Underages or minors are forbidden from buying this.

(PS: no use on metal).