The Arrow Arrow GL81SR 26D IC Entrance Lever Lock Is a Cylindrical Lock,The GL Series is a grade 1 heavy duty lever lock that is ADA compliant. Storeroom Lever Lock, SR Lever Trim Design, Satin Chrome Arrow GL Series Grade 1 heavy duty levers offer an economically pleasing solution for ADA compliance. The GL solution is designed with the installer in mind, providing fewer subcomponents to allow for an easier to install system. Simply put, the GL Series will be your number one choice when economy is your first priority.