Sorry it took so long to respond been busy at work. The knife was built in Australia by Peter Jensen. His website is down as of right now. It was built to my specs and he did an outstanding job. His quality is awesome. It is ATS-34 1/4 inch thick steel. I was going to have it built out of S30V but he did not have a time frame when the S30V would be in stock. If you guys have any other questions about it feel free to ask or e-mail me.