15w 450nm 33mm fixed focus laser head engraving module ttl/pwm can engrave on metal carving engraver

--made of hard aluminum and brass material, the surface is by anodized and sandblasting ,not easy rust,very durable. --one of the most powerful diodes available, upgrade your wood engraver to a metal marking machine. --it can mark metal and stone, cut wood, foam and other materials easily. --with heat dissipation fan,make it with longer service life.