I've hardly ever bothered with the torque wrench, apart from on really critical things like cylinder heads. I read once that the size of a normal spanner gives a good enough guide to how tight a nut should be. Applying normal but not gorilla force, a big spanner = very tight, a small spanner = gently. Most nuts are over-tightened, by amateurs because they think very tight is best: by garages because they use air tools and can't be bothered adjusting the setting.
The most useful thing I use mine for is applying leverage to undo really tight nuts. It's long, has a good tight grip on the socket, and unlike a breaker bar the line of the lever is very close to the nut, so you don't waste force having to hold the thing straight.
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