*PLUMBERSSTOCK EXPERT* responded:
Hello! Thank you for visiting Plumbersstock.com! When installing legs over an unwrinkled or smooth tile floor, it is recommended that you drill a small diameter hole into the tile to permit the pointed end of the bottom plug to anchor itself to the floor to prevent sliding. If you're ready to order these lavatory legs, just click "Add to Cart" and put your postal code and you're ready to go. It is our pleasure to serve you. For our latest offers and news about new products, you can subscribe to our free newsletter. Just register using your email address. Thank you for choosing PlumbersStock.com as your online shopping buddy! have a great day!