UltiFlex is a manufacturer of weapons that focuses on producing military-grade combat knives. Established in SEY 2538, the company gained recognition when the knives it produced for the United Planets of Earth (UPE) Army were deployed during the First Tevarin War. Following the government's transition to the United Empire of Earth (UEE) in 2546, UltiFlex successfully maintained its contract. After four decades of exclusive service to the government, the company broadened its reach to the civilian market. The UltiFlex brand is particularly well-known for its flagship product, the FSK-8 Combat Knife, which is included in the standard field kit for UEE soldiers and is favored by civilian survival enthusiasts.