I can laser engrave any QR Code onto various materials upto 200mm square and 100mm high. The image shown is my website code, I can also setup QR codes for wifi settings including network and password for use on motel keyfobs or cafe's. Why go to the bother of handing out pieces of paper when you customer/guest can scan the code directly into their phone.
Price quoted is for 30mm square engraving on your own item - larger items can be priced on application. Materials supplied at extra cost