Hi, this is Laura with Kohler Co. I am happy to assist you with your question. The Katun towel bar is not designed for installation inside a shower. It has not been tested in this type of installation so how it holds up is unknown. Thank you for choosing KOHLER.
Hello, my name is Tiffany with Kohler Co. I am happy to answer the question about the Katun towel bar. From the wall to the end of the bar is 3 5/8". Thank you for choosing KOHLER.