A shank is not a puncture rating
The listed steel shank should not be interpreted as proof of a tested puncture-resistant sole or a second protective cap. Each required property needs its own documentation. Similarly, 6 mm describes the advertised neoprene thickness, not a verified safe working temperature or guaranteed warmth level. The listing title spans sizes 7–14 rather than identifying one selected size.
Consider the whole wet-work routine
Compare the opening and lower-leg space with work trousers, and assess heel movement before accepting a loose pull-on fit. Ask about cleaning after mud and the time needed for the interior to dry. Waterproof and anti-slip are separate claims; neither establishes protection from chemicals or electricity.