Renssi Finland Oy –BETTER PIPE CLEANING TOOLS Renssi Finland Oy sells Renssi® Tools, which offer a wide range of high-quality pipe cleaning equipment. Our products are made of long lasting materials with great expertise of machinery and 3D-modeling. That's why our products are strong, effective and suitable for it's purposes. On the year 2008 we managed to create a ground breaking way to make the chain knockers. We are able to manufacture them to last longer and to be more effective than before. Later on we've designed new tools for various circumstances in the pipe cleaning industry.