We offer a wide variety of Commercial Grade Knobs including the following Schlage Commercial Locks: Orbit Knob, Plymouth Knob and Georgian Knob Schlage A-Series Heavy Duty Grade 2; Orbit Knob and Plymouth Knob Schlage D-Series Heavy Duty Commercial Grade 1. We also carry Corbin Russwin Commercial Grade 1 Knobs, Yale Knobs and Sargent Commercial Knobs, including the 6, 8, and 10 -Line series knob.