Cold Steel is credited with popularizing the American tantō in 1980. Cold Steel marketed knives made for them in the U.S. by Camillus using a carbon steel given the trademarked name "Carbon V" (read "carbon five"). Their imported knives were nearly all made in Seki, Japan using AUS-8 which Cold Steel labelled "400 Series Stainless". They also had two models made in Taiwan, both of which switched to Japan in 2000. In 2007 Camillus New York went bankrupt and Cold Steel was forced to find a new manufacturer for their carbon steel fixed blades. Cold steel first went to Mainland China (People's Republic of China) but allegedly due to quality issues they switched to Taiwan for production. At the same time Cold Steel moved all of their folding knife manufacturing from Seki Japan to Taiwan. The carbon steel was SK5 and stainless was AUS-8 both imported to Taiwan from Japan. However the Sanmai III models remained strictly Seki production.