SAP 4 - Fourfold Pandrol Fitting Machine SAP 4 is a machine, patented by Dipsa, designed to attach the rails to the sleepers by using PANDROL fasteners. SAP 4 can operate simultaneously on 4 fasteners with just a single operator. Share on LinkedIn (Opens in new window) LinkedIn Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on WhatsApp (Opens in new window) WhatsApp Related