History The YKK Group Quality management Environment policies Service center (FTC/FTS)	Working fairly together Since its founding on November 8, 1901, in Sonnborn (now a borough of Wuppertal) Stocko has grown from a small fabrication operation to a company active around the world. It is now a member of the YKK Group. Today, just as more than 100 years ago, our activities are targeted on ambitious goals: to offer all our customers quality and service at the very highest levels. Behind this lies a vision of fair and equitable cooperation - from person to person and between people and nature. Our adopting the YKK Environment Charter is intended to make a contribution to preserving the basis for all life - and to do this every day. No one knows better than we that seemingly small things can make a great difference.