Tips for Building
We do not test tools, we document them. Every figure on this site comes from an official manufacturer page or a dated price retrieval, and the source is always cited next to the figure.
Catalogue figures
They come from manufacturers' own pages, retrieved and dated internally. When a maker publishes two contradictory figures, we quote both and say so. We do not average them and we do not decide on its behalf.
Prices
Prices are retrieved automatically from Amazon every day. They may have changed since: the price that counts is the one Amazon shows when you buy. A price we could not retrieve is never replaced by an estimate.
We systematically exclude items that present themselves as compatible with a brand without being that brand: a battery sold for Makita is not a Makita battery, and showing it as one would give a false price.
Where AI fits
Product photos come from the manufacturers or the retailers: they are never generated or retouched. Guide illustrations, section covers and the mood images at the top of some pages are AI generated, for illustration only; this is stated under any visual linked to a product or a guide. They show no recognisable branded tool and are never used to present a product for sale.
Figures, scores and charts are never produced by an image model: they are calculated from the data we retrieve, with its source.
Adapter pairs
They come from Google and Amazon search suggestions, recorded in French, English and German. We keep only pairs the engines suggested themselves, meaning ones real users type.
What we do not do
We do not bench test tools and we present no test as having been carried out. We publish no editorial dates. We are not a substitute for a licensed trade: on electrical work, gas, load bearing structure and work at height, the applicable rules and inspections stand, and nothing on this site overrides them.