Visqueen Zedex Concrete Fixing Pins for Strip are stainless steel nail surrounded by a plastic plug. Visqueen Zedex DPC Fixing Pins are part of a 2-part system which includes the plastic strip and pins. The Fixing Pins are in 2 options, Masonry (concrete) or Insulation. This product is used to secure Visqueen Zedex Fixing Strip to concrete or masonry along the vertical application of a damp proof course or membrane. This product works by expanding into the drilled hole once the nail has been hammered through the plastic body of the pin. This ensures a secure and tough fixing for a longer lasting application. Please note that pre-drilled holes are required before application. For fixing Visqueen Zedex Fixing Strip to insulation, use Zedex Insulation Fixing Pins which are also available to purchase from us. Call us on 01628 674910 for expert assistance.