Fairbairn-Sykes

The Fairbairn–Sykes fighting knife is a double-edged fighting knife resembling a dagger or poignard with a foil grip developed by William Ewart Fairbairn and Eric Anthony Sykes in Shanghai based on concepts which the two men initiated before World War II while serving on the Shanghai Municipal Police in China. The F-S fighting knife was designed exclusively for surprise attack and fighting, with a slender blade that can easily penetrate a rib cage. The vase handle grants precise grip, and the blade's design is especially suited to its use as a fighting knife.