Product Description For enhanced protection from airborne debris, keep your face shield fitting and performing comfortably with the Uvex Bionic Face Shield Replacement Ratchet Suspension. This easy-to-set replacement ratchet suspension features 100% dielectric construction to ensure safety in electrical work environments. Smooth ratchet rotation and a reliable locking mechanism help you achieve the most comfortable and secure fit while you work. From the Manufacturer Ratchet Suspension for the Uvex Bionic Faceshield.