The main area of activity of KZO SA is the production of gray iron castings. For many decades, the company has been known mainly for its castings dedicated to sanitary, rainwater sewage and water supply networks (cast iron manholes, inlets, street boxes, pipes and fittings). KZO is constantly investing in new equipment, molding lines and technologies, thanks to which it has extended its offer with service, agricultural and automotive castings. The production is located in the town of Końskie, on the south of Poland.

The company offers consulting, design and manufacturing of equipment, foundry production, machining, painting and assembling of castings. An experienced team of employees ensures a high level of service at every stage of the contract.

Koneckie Zakłady Odlewnicze S.A is part of the Guss-ex Group,, founded in 1989.  Guss-ex Sp. z o.o. is an engineering company, active in foundry and metal industrial production.

It supplies the Polish and European markets with grey iron castings, ductile iron castings, aluminium castings and other metal products including machining.