So here's a question for the serious amateur or professional

Generally only one of each tool. The bigger companies all have lifetime warranty, if they break.

For common stuff, say a 10mm combo, keep 2 or 3, sometimes you need to modify one with a belt sander or torch for a certain job

>>14877441
>>14876996
Three. Two in the garage, because who can be assed to stop a project because you have to replace your only 13mm socket.

The third because I used to keep a moderately full kit in my jeep, three drawer slider tool box.

There is no such thing as too many tools, as long as you've got the space and they don't get in the way of you working (e.g. I can't find my 13mm under these dozen 1/2" wrenches! )

>>14876996
It's always good to have spares

>>14877441

You don't do much work, do you? You usually need two wrenches or whatever. One for each side of the fastener, or in case one breaks while you're in the middle of a repair and can't drive 50 miles to the nearest whatever.

>>14876996
You have an awesome headstart.
Since I'm a tool whore I'd keep them all. They come in handy, even having more than one of the same thing.
KEEP AND ORGANIZE THEM ALL

>>14877490
/thread

>>14877836
I can't think of a time when I've had to use two combination wrenches together. I either use a socket and a wrench, or a combination wrench and an adjustable wrench.

>>14878906
>I haven't worked on cars very much
There are times when my ratchet wrenches didn't even clear certain areas and I had to use two combinations.

>>14878906
Nor can I and I wrench 8 hours a day, at least not needing two normal size combo wrenches, sometimes I use two of the same size but ones an offset, stubby, or long, normally on suspension. Either way I still have extras of the most common combos I use but it's more for the reason I posted before.