Riverwood Stair designed and installed my staircase. They made all the parts because it is a very custom design. I LOVE MY STAIR! It's gorgeous -- a dream come true, and better than I had imagined. My grandchildren love it too -- it's sturdy and safe, and also totally elegant. The finish coatings are absolutely beautiful as well. I appreciated Tom Rowley's clear communications with me throughout the process. I can still barely believe I have such a beautiful and functional stair in my own home.