All Birdbath Bowls have 3 stainless steel nuts welded to the base so it is possible to fix any of them onto stone or concrete them in. Please note that generally people choose not to fix Birdbath Bowls onto stone if it is for a private garden and just have them sitting there. However if the Birdbath Bowl is for a public place we always recommend fixing the sculpture to a base. We can supply 3 lengths of high grade stainless steel thread upon request.
Depending on what sort of stone it is we suggest trying a masonry drill-bit first. If the stone is too hard you will need a Diamond Drill Bit and it may be easier to get someone out of the local phone book under Stone Drilling/Stone Mason to do this for you. Once the holes have been drilled we would recommend fixing the high grade stainless steel thread in with Chem-set/A100 or a similar concrete fixing type product.