[header] How to remove a knobset lock [title] Examine the base of your knob to determine what kind it is. [step] There are two main types of doorknobs with hidden levers. These hidden levers can be in the form of a thin slot or a pinhole. 
Determine which kind of knob you have, because each knob will detach from the door differently. [substeps] These hidden levers are also called detents.