Determine whether you will need an allen wrench or a screwdriver based on the style of set screw which you will find on the bottom of the door lever.
Tightrn security door handle.
If that is the case use a screwdriver instead of an allen wrench.
In order to tighten the screws in a loose door knob or loose door handle you need to work on removing your loose door knob or loose door handle from the door that it is currently on.
The detent is a spring activated pin concealed or small thin plate attached to the spindle that protrudes into a doorknob notch which prevents rotation.
Tighten internal screws loose door knob or loose door handle.
Use whatever screwdriver or wrench is appropriate to tighten this screw and firm up the doorknob s grip on the spindle.
Remove the screw and slip the lever handle off the rod.
Occasionally the door handle may instead use a different screw type such as a phillip s head screw.
Insert the tip of the wrench into the screw and rotate the tool counter clockwise until the faceplate is free to slide off.