It all started in 2008, with an innovation of producing a carbide chain knocker. This innovation started the journey of becoming one of the most recognized chain tool suppliers in the world. Step by step the company built up the Renssi product portfolio as wide as it is today including different cleaning-, cutting-, and unclogging tools and equipment. This systematic reach to grow the business makes their development as a company interesting. Renssi Finland Oy aims to be one of the greatest tool manufacturers in the industry, and so they keep their product development active to answer the increasing demand for better and more efficient tools. Renssi – Better Drain Cleaning Equipment for Professionals.