OK, the sticker gave me a chuckle. But 15$ ??? Sheesh, you can buy a Chinese micrometer for that with free shipping!!
https://www.ebay.ca/itm/2PCS-Warnin...918603?hash=item1ea1950c0b:g:fBYAAOSwHnFVq3dX
https://www.ebay.ca/itm/2PCS-Warnin...918603?hash=item1ea1950c0b:g:fBYAAOSwHnFVq3dX