Ha. Duplicate tools...
I have my main box with all my tools I wrench with.
Then, I’ve got 5 vehicles and a motorcycle.. Each has a tool kit tailored to their needs (metric vs SAE)...
Then there is my junkyard box with metric and SAE. I used to have two separate junkyard boxes (one with metric and one with all SAE) that way I only grabbed the box with tools for the vehicle I am going for. But too many times, I’ve found vehicles with good parts that I’m not looking for (ie take metric and there’s an old dodge truck I could use parts from).
It’s safe to say that I have just about 7 duplicates of wrenches, sockets, ratchets, extensions, screwdrivers, etc....and probably MANY more than that.
Many times, I’ve put an extra tool in one of my car kits, only to find it works better than the one in my main box (maybe different brand, depth, length, etc).. then I have to buy another one like it to put into my main box.
But I drive classics 99.99999999% of the time (vehicles from the 60’s/70’s). So I have to have tools in them all. Breakdowns (while rare) are easily fixed roadside unless it is major. I wouldn’t feel right getting towed home because I didn’t have a screwdriver (at minimum) to change a split radiator/heater hose...... When I had 1 kit I transferred it between vehicles. But it was a pain because the box didn’t fit in all the vehicles the same.. So, I ended up getting boxes of different dimensions....
I’m glad I do have so many “duplicates” though. Many times when I had my other 4x4, I would help someone on the trail. If I didn’t have metrics, I couldn’t help most of them (my 4x4 was a 74 dodge W200 so it was SAE).
You could never have too many duplicates. Unless it doesn’t see the light of day for years on end, sitting in a toolbox and that toolbox is taking up valuable real estate in your shop. Then maybe it may be time to thin the herd....