Knob & Lever Lockset
Knob locksets and lever locksets are types of handles and locks that are installed on doors, storerooms, and larger cabinets. Most are used in commercial, educational, healthcare, or industrial settings and are made of sturdy stainless steel. They differ from deadbolt locks and handles and pulls by the mechanical knob or handle which is turned by hand to move a latch into or out of a latch hole in the doorway. Cylindrical locks are built in to many of these types of handles.