Maun · SKU 1701-012

Maun Steel Straight Edge Imperial 12″ (1701-012)

Small enough for the bench. Accurate enough for serious work.

The Maun Steel Straight Edge Imperial 12″ (1701-012) is a 305 mm carbon-steel straight edge with a precision-ground bevelled working edge, accurate to 0.001 inch per foot (0.084 mm per metre). UK-made, it’s a compact bench tool for marking, scribing and cutting small plates, gaskets and leather parts.

£22.00inc. VAT · £18.33 ex VATIn stock

Length

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12″ length for close control on compact components and bench work.
Accurate to 0.001 inch per foot (0.084 mm per metre): within 0.001 in (0.025 mm) over the full 12″.
Bevelled working edge gives a clear line of sight on small parts, gaskets and wallet pieces.
Robust 3.25 mm carbon-steel body: reassuringly heavy, so small workpieces stay put.

Best suited to

Small plates
Gaskets
Wallet parts

UK-madeMade by Maun

12 months’ warrantyOr 2 years when you register it

Stated accuracy0.084 mm per metre

Product description

The 12″ Maun straight edge is the compact choice for detailed engineering, gasket work and leathercraft. Unlike an ordinary rule, it has a published straightness tolerance, and a substantial body made to guide your tool, not just measure a distance.

Why the Maun Steel Straight Edge Imperial 12″ (1701-012) works

Accurate work. Less rework.

0.001 in (0.025 mm)over the full 12″

Over its full 12″ length, the bevelled working edge stays within 0.001 inch (0.025 mm) of true.
That’s the confidence you need when marking out small plates, covers and gaskets, where even a tiny error shows.

See the line clearly.

12″of bevelled working edge

On close bench work, your eye is right over the job.
The bevel puts the mark or cut exactly where you can see it, helping you avoid parallax on short, detailed lines.

Built for repeated use.

3.25 mmcarbon-steel body

At 3.25 mm thick, the carbon-steel body is robust and reassuringly heavy for its size: heavy enough to hold small pieces flat while you work, day after day.

Best suited to

Manufacturing & Engineering

Choose the Maun Steel Straight Edge Imperial 12″ (1701-012) for close-control bench work: small plates, components, gaskets, covers and compact fabricated parts.

Its short length is easy to position where space is tight.
The 3.25 mm surface-ground carbon-steel body gives you a firm base for marking and scribing, and the bevel keeps short reference and cut lines in view.
With a stated accuracy of 0.001 inch per foot (0.084 mm per metre), it’s a dependable choice for practical straightness checks: something an ordinary rule, with no published tolerance, can’t offer.

Leatherwork

Use the Maun Steel Straight Edge Imperial 12″ (1701-012) for wallet parts, tabs, narrow strap blanks and other detailed leatherwork, where control matters more than reach.

Its weight holds small pieces flat.
The bevel keeps your knife or scoring line in view.
And the steel edge stands up to repeated blade contact far better than softer aluminium or plastic rules.

Specifications

SKU	1701-012
Length	12″ (305 mm)
Body	surface-ground carbon steel, 53 mm wide and 3.25 mm thick
Working edge	precision-ground and bevelled
Accuracy	0.001 inch per foot (0.084 mm per metre)
Straightness over its length	within 0.001 in (0.025 mm) over the full 12″
Storage	6 mm hanging hole; supplied in a wallet with anti-rust paper
Made	UK-made, under our ISO 9001 quality system
Warranty	Standard 12 months’ warranty. Register your tool to extend this to 2 years.
Alternatives	18″ for more reach; 24″ for longer bench cuts.

The working edge

The bevel runs along the whole of one long edge. You run your scriber or knife against it, so you can see the line as you go.

Frequently Asked Questions

What is a 12-inch steel straight edge used for?

A 12-inch (305 mm) steel straight edge is used for short, precise lines on the bench: marking out small plates, covers and gaskets, scribing compact components, and cutting wallet parts, tabs and narrow straps in leather. The Maun 12″ is accurate to 0.001 inch over its full length, so it’s a dependable reference for short lines.

Is a 12-inch straight edge long enough for my work?

Yes, if your longest line is under 12 inches. It’s the best choice where space is tight or control matters more than reach. If you regularly mark or cut longer lines, step up to the 18″ or 24″. Finishing a line in one pass is more accurate than moving a short tool.

Should I choose the 12″ steel or the 300 mm aluminium safety straight edge?

Choose the 12″ for scribing metal, marking gaskets and cutting leather, where reassuring weight and a hard-wearing bevelled edge count. Choose the 300 mm aluminium for knife work close to your steadying hand: its recessed profile protects your fingers and its non-slip backing grips smooth materials. Both are accurate to 0.001 inch per foot (0.084 mm per metre).

Last updated 11 November 2026

Content reviewed by Rebekah Jackson, Digital Marketing Executive at Maun Industries Limited, formerly on Maun’s production team, on 21 October 2026. We last checked prices and stock against maunindustries.com on 11 November 2026.

Size check: is 12″ long enough?

It’s long enough for the long side of an A4 sheet (297 mm) in one pass.
It’s too short for the long side of an A3 sheet (420 mm). For that, choose the Maun Steel Straight Edge Imperial 18″ (1701-018).
One size up is the Maun Steel Straight Edge Imperial 18″ (1701-018).

Steel or aluminium: which suits your job?

This straight edge