Thanks dave455!! Question is if you could only keep one set of metric spanners, what would you keep? I know it is hard and good thing is is theoretical!!
That is a tough one!
The reason I have wrenches by different manufacturers is that here in the U.K. I need Whitworth, SAE and Metric, and I like to be able to tell them apart quickly!
My favourites are the Britool! Shape, size, finish, everything is perfect, plus they are proven over many years! But... these are "old" Britool dating from the early 70's and are simply not available anymore. I only own a complete set in Whitworth / BS, and would love some in metric, but they are not out there! Sadly, with Britool the era in which they were made is critical. Combination wrenches from the early 80's are good, but there were pattern changes and they are not as good!
So, that leaves us with the other 3! I think overall the Snap On are the best. I think they are the best made, certainly the best finished, and would be my undoubted choice for aerospace applications!
However, their beautiful finish can get marked with repeated use over time. Now I know many will argue that use (as opposed to abuse) will not damage a decent tool, and they are correct, but wrenches do get dropped from time to time, or scraped against other components, and that will take it's toll on the Snap On!
So, limited to one set only, specifically for automotive work, specifically new, probably the Stahlwille or the Hazet. Which is precisely what I have! I bought a set of Stahlwille's, (up to 19mm) some years back and they have been great. I've added some wrenches in the larger sizes by Hazet, simply because that was what a local dealer had in stock, and they've been great too! Stahlwille's have deep offset on their long wrenches, but not their short, with Hazet it's the other way around!
In an ideal world of mega workshops and big budget's I'd probably have both,
and if I stepped onto a Snap On truck and he had complete sets of combination wrenches on 'special' for £99 I don't think I could resist buying them as well!!