Lock handle set for patio door

A home owner from Washington says:
Hi I?d like to order a handle lock set with keyed lock installed from your company, to replace my existing set which does not lock. I need two sets for two identical doors as pictured below.

Can you please help me to learn how to measure to ensure I am ordering the correct sized set. Is there a specific way for me to measure? Thank you very much. Scott
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Tom from SWISCO responded:

Sure, I feel very confident that our 82-081 handle set will work for your door. This has a 4-15/16" hole spacing, center-to-center, which should match what you have now. It will also be fully compatible with your existing mortise lock.

A home owner from Washington says:
Thank you sir. I will order today. Thanks again for your assistance.
A home owner from Washington says:
Hi Tom
One quick follow up. I see it says
"Includes installation fasteners for doors up to 1-3/8" thick"

My door appears to be 1- 1/2" thick.

Is there any other parts or accessories I should buy along with the 82-0281 to ensue a good fit?

Thanks.
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Tom from SWISCO responded:

In your case, I would advise reusing your original screws. That should allow you to use our handle set.

A home owner from Washington says:
That's Tom.
A home owner from Washington says:
Hi Tom,
This part of the lever does not seem to fit flush over the black plastic piece in the handle. Can you advise. Thanks. Scott
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Tom from SWISCO responded:

I would try removing that black plastic piece from the handle to install the thumb lever.

A home owner from Washington says:
Thanks I will give that try.
A home owner from Washington says:

Success

Thanks. Ordered another one today.

I had a difficult time cutting the spindle. I used hack I saw and couldn't make a cut. Wound up snapping it in a couple of places and got lucky.

What TPI blade would you generally use to cut the spindle.

I ordered an extra spindle just in case I mess it up.

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