Kerb Race Machine Clean, efficient and strong kerb finish Kerb Race Extrusion When it comes to offering your kerbs the best results, your first choice should always be extruder machines. Each unique in their own way, both of these kerbing technologies can offer you impressive results when used wisely. Bell Contracting are leading the way with this technology and are one of the very few companies to own this Australian product. After a 12 month period of testing, we have perfected this product and are proud of the finish we can offer our clients. Click here to see it in action for the first time.