Becho Double-Sided Guitar String Action Ruler, Metric and Imperial

The Becho double-sided guitar string action ruler is a compact stainless-steel gauge for measuring setup points on guitars and other string instruments. Its metric and imperial scales cover string height, pickup polepiece height, bridge saddle and slot depth, nut height and fret slot depth.

At a glance

Dual metric and imperial scales support setup work without converting units separately.
Listed measurement points include string height, pickup polepiece height, bridge saddle height and slot depth, nut height and fret slot depth.
The listing describes a pocket-sized design with polished, rounded edges and etched markings.

Price

$11.89Save 15%

Reference price: ~~$13.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Compact format is suited to keeping with guitar setup tools or carrying between instruments.
The stated scales cover several common guitar adjustment measurements, including string action and nut or saddle work.
Metric and imperial markings are useful when instructions or measurements use different units.

Technical specifications

8 specifications

Measurement and use
Measurement systems	Metric & imperial measurements.
String height scale	0.01-0.14"/ 0.25-3.50mm
Bridge saddle slot depth scale	0-0.875" / 0-20mm
Nut, saddle and polepiece scale	0-0.75" / 0-20mm
Suitable instruments	Suitable for string instruments such as guitar,bass,mandolin,banjo,etc

Construction
Material	Stainless Steel

Dimensions and installation
Dimensions listed	9.1 x 5.1 x 0.3 cm; 30 Grams
Weight listed	30 g

What to know before buying

Listing details to confirm

The listing gives conflicting size and weight details: dimensions are listed as 9.1 x 5.1 x 0.3 cm and weight as 30 Grams or 30 g, while the description states 9mmX51mm, a ruler size of 8.9 * 5.1cm / 3.5 * 2" and weight of 19g / 0.04lbs. Confirm the intended dimensions and weight if they matter to your purchase. The product listing also describes the ruler as double-sided, but does not detail which measurements appear on each side.

Who is it for?

A good fit for

Guitarists checking string action and other setup measurements on electric, acoustic or bass guitars.
Luthiers and hobbyists who need a pocket-sized gauge with metric and imperial markings.
People working on mandolins, banjos and other string instruments, as stated in the listing.

Less suited to

Buyers who need a complete guitar repair kit rather than a measurement ruler.
Anyone who needs a confirmed exact size or weight before purchasing without checking the listing details.

Becho Double-Sided Guitar String Action Ruler, Metric and Imperial · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 43 ratings

5 stars81%81%
4 stars16%16%
3 stars0%0%
2 stars0%0%
1 star3%3%

Aggregate ratings are generally positive, with most ratings in the five-star category, but a small share are one-star. Without written feedback, the ratings do not explain what buyers liked or disliked. The ruler's stated dual-unit scales and range of setup measurements suit buyers seeking a compact gauge, while they do not confirm scale readability or measurement accuracy.

Frequently asked questions

What measurements can this Becho ruler make?

The listing says it can measure string height, pickup polepiece height, bridge saddle height and slot depth, nut height and fret slot depth. It gives separate stated ranges for string height, bridge saddle slot depth, and nut, saddle and polepiece measurements.

Does it use metric or imperial units?

Both are listed. The description also gives a conversion of 1INCH=25.4MM.

Which instruments is it intended for?

The listing names electric, acoustic and bass guitars, as well as mandolin and banjo. It also broadly describes suitability for string instruments.

Are the ruler's dimensions and weight clear?

No. The details section lists 9.1 x 5.1 x 0.3 cm and 30 g, while the description gives different size and weight figures. Check the selected listing if these details are important.