Link Controls have a comprehensive range of operators for use on bi-fold doors. The Fastfold system comprises of an industrial duty hollowshaft operator mounted on a smooth running trolley system with controls and auxiliary equipment designed to suit your specific needs Providing full and safe operation. In order to provide a system that is tailored to your exact requirements we have included a guide to assist you in providing the exact measurements that are required when ordering the sliding / folding door track system. These details must be carefully checked at the design stage and site survey to ensure there are no restrictions.