The Xpanda RDF is normally attached to the bottom of roller doors to provide increased security and locking points to prevent the roller door from being forced open. All components are made from steel and are hot dipped galvanised for corrosion resistance. A high tensile eyebolt, which can be removed to allow unrestricted movement, and a threaded housing pack is secured to the concrete floor. A 5mm thick steel laser cut box shaped housing is permanently attached to the roller door with 12mm coach bolts and a shielding plate. When the roller door is in the closed position, the box housing fits over the eyebolt and a padlock is then locked through the eyebolt. The shape and design of the housing prevents the padlock from being attacked.