I've seen a magnetic tack hammer with a varnished wooden handle that had one of those stickers on it here in the UK. Was wondering if it was in case you chewed

I've seen a magnetic tack hammer with a varnished wooden handle that had one of those stickers on it here in the UK. Was wondering if it was in case you chewed the varnish. Perhaps someone should just put a label on the roadsigns as you enter the State of California saying, "May contain nuts".