These type are durable. The key is dyed, then the dye layer is removed to make visable again the original key plastic. It's more of engrave really than laser. At least I think this is the same way, feng correct me if wrong.
Look forward to see what new things for the groupbuy. I would especially be interested in more colorful big set that not counter strike. I never seem to be able to get dye so nice and even when I tried it.