By popular request, we have added a 3M Dual Lock kit to allow you to mount your European license plate without drilling or using screws.  We have been testing it for months and can honestly say it is rock solid.  We currently offer it in clear so that you can mount your plate and remove it and it is difficult to see the Dual Lock on your bumper.  Get a couple of kits – one for your US plate and one for your Euro plate and then you can swap them out if you need ;).  Each kit has 5 squares about an inch in size.  There are 2 pieces to each square – just like standard Velcro.