What started as an idea between friends has today grown into a successful medium-sized family business. TWK was founded by Theo W. Kessler in 1962. His childhood friend Dr. Willi Steinebach supported him as an advisor in corporate law and tax matters. In 1992, his son Johannes W. Steinebach took over the company. Now in the third generation, Drs. Hannwelm and Felix Steinebach as well as their brothers Robert and David Steinebach are active in the company. The foursome focuses on management, product management and controlling.