Enhance Your Security with the Winkhaus Bi-Fold Gearbox Upgrade your home security with the Winkhaus Bi-Fold Gearbox featuring a 28mm backset. This innovative locking mechanism offers unparalleled protection and peace of mind for you and your loved ones. Benefits: Ultimate Security: Keep your property safe with this high-quality gearbox that provides maximum protection against intruders. Easy Installation: Simple and hassle-free installation process ensures that you can enjoy enhanced security in no time. Durable Design: Built to last with premium materials, this gearbox is designed to withstand wear and tear for long-term use. Smooth Operation: Experience effortless locking and unlocking with the smooth operation of the Winkhaus Bi-Fold Gearbox. Versatile Compatibility: Compatible with a wide range of bi-fold doors, making it a versatile solution for various applications. Invest in the Winkhaus Bi-Fold Gearbox today and enjoy the benefits