Repair tools
The tools you buy once.
Tools are the easiest category on this site to judge honestly, because the important figure is usually a standard rather than a claim. A torque wrench is certified to a stated tolerance. A jack and its stands are rated to a load. A scanner either commands the car or only listens to it. Where a specification is a standard we can hold a product to it; where the box invents a number instead, we say so.
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Jack stands
The recall no spec sheet could have predicted.
1.7 million stands recalled for collapsing under load — and the cause was production tooling wearing out. Same item number, same rating, safe early and unsafe later.
The only page here with no product link
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Torque
One wrench does not cover the car.
A click wrench is certified to ±4 per cent — and only over the upper part of its scale. The 1/2 in drive most people own is out of specification on a spark plug and a drain plug.
±4%, from 20% of scale
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Scanners
$16 or $350. Almost the same data.
Across a 22× price range the live-data channel count barely moves — the correlation is +0.16, and the unit reading the most costs $50. What price actually buys is bidirectional control.
16–21 channels
One page in this section deliberately recommends nothing. Jack stands are the category where the premise of this site fails: the 2020 recall was caused by production tooling ageing, so the specification was identical on the safe units and the unsafe ones. Where reading the numbers cannot protect you, we say so instead of picking a product anyway.