Etched graduations survive what printed ones do not · review
A 300 mm (11.8 in) semi-flexible steel rule from a trade tool brand. The listing states the length, the material and nothing else.
What the figures leave us with Buy it for the flex, which is a genuine and specific capability. Do not buy it expecting a specification sheet.
A rule that bends is a different instrument, and this one is sold on that alone.
A semi-flexible steel rule, 300 mm (11.8 in), sold singly. That is the full extent of the published specification.
Measuring the circumference of a pipe, the development of a curve, or the length of a molding that is not straight — all of these need a scale that lies down on the work. A rigid rule cannot, and a tape can but reads through its own case and its own curvature. A spring-steel rule sits flat against the surface and is read directly against it.
It is not a straightedge. Pressed against by a knife it will deflect, and the cut will follow the deflection. It also cannot be trusted to check flatness, which is a rigid rule’s other job. If a single rule has to do everything, the rigid ones in this hub are the safer choice.
Read on the day this page was built: $29 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 31 August 2026. The live price is at the top of the page.
| Amazon reference | B001NZ1VLI (identical on 6 markets) |
|---|---|
| EAN | 4042146067482 |
| Stated dimension or range | 300 mm (11.8 in) |
| Material | semi-flexible spring steel |
It bends along its length so it can be laid around a cylinder, into a shallow curve or against a molding, and read there. A rigid rule spans the chord instead and reads short.
No, and that is the trade. A rule that flexes to follow a curve also flexes under a knife, so it cannot guarantee a straight cut. If you need both, you need two rules.
Not in this listing. It states the length, the material and the pack quantity. We do not print a figure we cannot source.
7.4/ 10
Buy it for the flex, which is a genuine and specific capability. Do not buy it expecting a specification sheet.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
Measuring around curves and into shallow radii, where a rigid rule cannot sit down.
Specifications: the manufacturer sheet for measuring instruments and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
300 mm (11.8 in) stainless · 1 mm (0.04 in) thick · EC accuracy class I · deep-lasered scale
The only rule in this hub that states an accuracy class, and it states the tightest one: EC class I, on 1 mm (0.04 in) stainless with a deep-lasered double scale, made in Germany.
Best for: The rule the other tools get checked against, and the one to scribe along.
Metal rule · joinery, drawing and construction use
A metal rule sold across several lengths for joinery, technical drawing and site work, described as resistant to mechanical damage and easy to clean.
Best for: General workshop use where the rule is a tool among tools rather than a measuring reference.
200 mm (7.87 in) stainless · etched scale both sides · non-glare finish
A 200 mm (7.87 in) stainless rule with permanently etched graduations on both faces and a non-glare surface — the two construction choices that decide whether a rule is still readable in five years.
Best for: Bench work where the rule is read dozens of times a day and needs to stay legible.
