Measuring & Marking

Combination Square

A square, a straightedge, a depth gauge and a level in one. Accurate 90° and 45° references set the standard for the whole build.

Measure stage

Specification

Blade length	300 mm / 12 in
Head	Cast zinc with brass wear plate
Angles	90° and 45°
Level vials	1 in head
Graduations	1 mm / 1/32 in
Scribe	Hardened steel

What it is for

A square, a straightedge, a depth gauge and a level in one. Accurate 90° and 45° references set the standard for the whole build. This guide covers what the tool does, the specification points that actually change your results, and how to use it without damaging the work or yourself.

Where it fits in the build

This is a measure stage tool in the Measuring & Marking category. Lay out accurate parts before any cut is made.

Measure Measuring & Marking

Using it well

Check the square against a known straight edge before a critical layout — drop it once and it loses trust.
Use the 45° face for mitre layout, but verify the mitre on scrap first.
The scribe stored in the body is for marking on metal and for transferring curves, not for cutting.

Compatible materials

Materials this tool handles without compromise. Where a material is not listed, check that the tool is rated for it before committing to a cut.

Hardwood
Softwood
Plywood
MDF

Reference sample in 3D

The model above is a real European oak reference block rendered in the browser. It is simulated from a height field rather than photographed, so you can rotate it to see how light behaves across the grain, the end grain and the edges. Drag it, or use the view buttons to look at the top face or the end grain in isolation.

Why this matters

Reading how light falls across a board is the fastest way to judge whether a surface is flat. That is the same judgement you make with a hand plane or a sander, and it is much easier to see on a rotating model than on a static photo.

Educational content only. Settings, capacities and safety guidance here are general starting points, not instructions for your specific tool, material or situation. Always follow your tool manufacturer's manual and any material datasheet, and check your own measurements before cutting.

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