Metal where you need it, not where you don’t: Columbia Steel wall castings give your shredder improved wear part life and material flow. Our modified front and back wall designs have had great success in the field since 2005. By adding material to high-wear surfaces, while decreasing material where it’s unnecessary, we’ve engineered casting sets with longer life and better productivity. Benefits of Columbia Steel's front wall and back wall conversions kits include increased wear life, quicker and easier changeouts, and superior shredder performance. Ask us if one or both of these wall conversions are right for your shredder.