Corefix 120 heavy duty steel-reinforced fixing for dot and dab (plasterboard over blockwork) walls. Suitable for all brick and block types, including lightweight blockwork. Ideal for securing deeper fixtures of between 10mm and 30mm thick such as timber battens, shelves and cabinets. Steel core bridges the gap behind the plasterboard and transfers load to the solid blockwork and prevents the plasterboard crushing. Maximum distance of 45mm from outer face of wall to blockwork behind.