The QL87SB 26D CS Arrow Cylindrical Lock Is a Classroom Function Lever Lock, S Lever, B Rose, Schlage C Keyway, Satin Chrome Finish. The Arrow QL Series is a robust Grade 1 lockset featuring a Freewheeling Lever for abuse resistance, two screw lockset install for quick installation and a 10 Year Mechanical Warranty. The perfect solution for replacing or upgrading lockets in commercial applications.