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.
Tightrn security door handle.
If that is the case use a screwdriver instead of an allen wrench.
That s because modern door hardware uses a hidden mechanism called a detent to fasten the doorknob that can only be released using a small screwdriver tip or the end of a paper clip depending on your style of hardware.
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.
Occasionally the door handle may instead use a different screw type such as a phillip s head screw.
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.
Insert the tip of the wrench into the screw and rotate the tool counter clockwise until the faceplate is free to slide off.
Step 2 inspect the rod s surface and locate the groove where the set screw needs to be secured.