The World's Most Tamper Proof Security Fasteners Bryce Fastener is the leading manufacturer in the world producing the highest-level security screws, security nuts, security bolts and fasteners. Governments, military and nuclear facilities depend on Bryce theft proof products to keep the bad guys out. Banks, schools, prisons and high-tech facilities rely on Bryce Fastener as do solar panel and medical equipment manufacturers, thousands of retail stores and companies who take protection seriously. From theft proof nuts to vandal proof screws, Bryce offers it all. And if one of our anti-theft products isn't right for you, our team of designers will develop one to fit your specific needs.