Hi Mr. H.W. Pick,
If you are going to work in the field of locksmithing, you should learn to carry around a can of lubricant with a straw connected to the nozzle. Unless there is the slightest chance you are going to have to impression the lock you are to open, lube it and exercise the tumblers with a blank of the proper keyway to get the lubricant into the tumbler chambers. You are just spitting into the wind if you don't lube them first, because even a simple kwikset becomes a bear if the tumblers won't slide easily or get stuck above the shearline.
I tend to leave the drill in the truck except for the most extreme cases. Kwikset is never an extreme case- there are at least 2 and sometimes 3 bypass methods available that will open the door and leave the lock undamaged. Learn them soon if you do not know them. I am not sure I can share them on this forum, so I won't. Maybe one of the moderators can make a decision on that, but I can't.
If there is a chance that you have to impression a lock that you just lubed, also carry contact cleaner on the truck. It will wash out the lock and evaporate, leaving it dry for impressioning.
Best of luck to you- you've just taken an involuntary vow of poverty, and shortened your lifespan by ten years. The good news is that there is no such thing as retirement, and you will never be unemployed again(just underemployed!)
Al

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