There were a couple of the regular "Keystone" series, numbers IX and X from 1999 and 2000, where only the master blades were ATS-34, but the File & Wire series knives use all ATS-34 blades. The only exception I'm aware of was the very first F&W knife released in 1998, the 5-1/4" folding hunter in QS14 stainless steel (440A).