. I just need to double up on a few tools.
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That's the drawback without a doubt, but not as many as you might think - screwdrivers and spanners seem to be the most common. I found many are not used for anything else - e.g. my fencing pliers aren't used for anything but fencing - same with my gas spanners. There is a spare Stanley knife in my leatherwork kit and a spare Mora in my beekeeping toolbox - but it works for me