Unfortunatley it does not say what size you need as it is provided with the lockset.
Hole in shaft of door lock allen wrench.
For whatever reason the screw has left handed threads that is righty loosy lefty tighty.
Like sierraeast s link shows that little hole in the shaft should have a set screw in it.
Some lever handles have hexagonal shaped fasteners that require an allen wrench for removal.
That silver button is the set screw.
Many items requiring assembly including some furniture certain children s wagons and other gear use hex head screws to secure matching parts together.
If you are experiencing the lever falling off the set screw is still in the shaft.
You need a small allen wrench to unscrew it and then you can remove the thumb latch.
I have a kwikset door handle lever it s gold with no lock on it.
About hex wrenches keys.
Clean out the hex hole in the bolt head with a small screwdriver to remove any caked dirt insert the allen key socket tap it with a small hammer to be certain it s fully seated in the hole squeeze the trigger on the impact wrench and whacketawhacketawheee out it comes without any drama.
Hex keys with t shaped handles can provide increased turning power and more comfortable grips.
Use an allen wrench to remove the lever.
This would be confirmed by looking at the interior lever where there is a set screw that is screwed out from the shaft to hold the lever using the hole in the lever.
The key end of allen keys is a hexagon or six sided shape.
Slip the long shaft of a 5 16 inch allen wrench into the space on either side of the slide bolt to engage in the cylinder set screws and turn the set screw counterclockwise two to three full turns.
I ve tried rotating the lever all around to reveal the hole but there is nothing that will get the lever to pop off.
Place the lever back on to the shaft using a 3 32 hex wrench tighten the screw through the lever and shaft.
But there is a small peice of metal that is blocked anything from getting in.
Turn the wrench to remove the fastener then pull the lever away from the door by hand.
There is a small hole on the lever that i m supposed to be able to fit an allen wrench or paperclip into and then remove the lever.
A 3 32 hex wrench is used to turn the screw kwikset provides one with the lock.
A hex wrench or allen wrench features a hexagonal shape and can be used with automotive plumbing and electrical applications.
Look for these fasteners along the base of the lever then use an allen wrench that fits snugly into the head of the fastener.
If you remove the lever and on one side of the shaft there is a hole and the other side there is a silver button.
Use ball end hex keys at an angle off axis to the screw.
5 32 standard hex dogging key with full loop allen wrench door key for push bar panic exit devices solid metal 10 packs 4 8 out of 5 stars 206 8 99 8.