KVT-Koening AG- www.kvt-koenig.com- , a Swiss Company based near Zurich, in Dietikon is specialised in fastening and sealing systems. Since 1974 KVT-Koenig -AG has been developing and producing the "Koenig Expander®" - a product used in many component in automotive industry and also in many hydraulic and pneumatic systems, The KOENIG-Expander® is a system to seal holes with absolute integrity in various components. Compared to earlier methods, such as threaded plugs with or without sealingsoftware, press-in pins, welding, etc. the KOENIG-Expander® distinguishes itself by its fast and reliable installation while incorporating reasonable installation tolerances