Arrow Cylindrical Lock QL87 SB 26D IC Is a Classroom Lever Lock SFIC Less Core, In a Satin Chrome Finish. Classroom Lever Lock, S Lever, B Rose, SFIC Prep Less Core, Satin Chrome The 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.