This bathroom copper sink has a standard 1.5 diameter hole at the bottom center and it does not have an overflow system. It is designed to be undermounted. It has embossed six lizards all the way around its main body, details can be observed in the second picture. The hammer footprint is very visible. The reddish/oxidized texture is characteristic of natural copper when it is cooled down from red-hot temperature using cold water, technique in use by the copper-smiths.This copper sink was made from one sheet of copper, raised with the artist hammer, there are no welded joints, as a matter of fact, the lizards were pulled out of the copper sheet itself. The finish is in a dark brownish color. Suitable for your bathroom, it will add a unique home accent making it a very special point of attraction in your bathroom. The copper sheet is 16 gauge (0.05" thickness)."Hand-hammered and mold-cut to perfectionHandcrafted by Mexico''s Finest ArtisansWe include 1" long brown screws in all of our hammered copper switch plates