No one can know how accurate it is unless you have a comparison tool. I suppose that's accurate enough. The set appears to be complete. What to look out for: The polished steel case is slippery; the mark showing the nm value on the scale is red (good) but very small and difficult to see; there is a range of steps between visible nm values (may well be); You may need to loosen the folding handle to move it more easily - you will need a small Allen key to do this. The bits are slightly magnetized, as is the little carousel.
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