Mitre Squares

About Mitre Squares

A mitre square is a fixed-angle precision tool designed specifically for marking and verifying 45-degree angles in carpentry and joinery work. Unlike adjustable angle finders, these specialist squares maintain a permanent 45-degree setting, making them the reliable choice for checking mitre joints on picture frames, skirting boards, architraves, and decorative mouldings. MyToolShed.co.uk stocks professional-grade mitre squares built to exacting standards, ensuring consistent accuracy across every project.

Traditional mitre square construction features a stainless steel or hardened steel blade permanently fixed at 45 degrees to a robust handle, typically crafted from hardwood, aluminium, or composite materials. This simple, solid design eliminates moving parts that could slip or wear, delivering dependable 45-degree measurements without adjustment drift. Premium models from manufacturers like Hultafors are engineered with tight tolerances and corrosion-resistant materials that maintain precision even after years of site work.

Applications

Mitre squares are essential tools across numerous trades and applications:

• Carpenters and Joiners: Fitting skirting boards, architraves, picture rails, dado rails, and creating precise corner joints in furniture construction
• Cabinet Makers: Producing accurate mitre joints in fine furniture and bespoke cabinetry
• Picture Framers: Creating perfect 45-degree corners for professional-looking frames
• Shop Fitters: Installing decorative mouldings and trim work in commercial environments
• General Builders: Fitting crown moulding, coving, and architectural details
• DIY Enthusiasts: Home improvement projects including skirting board replacement and frame building
• Restorers: Period property work involving historic mouldings and decorative woodwork

Choosing The Right Mitre Squares

When selecting a mitre square from MyToolShed.co.uk, consider these key factors:

Build Quality: Look for stainless steel or hardened steel blades that resist corrosion and wear. Handles crafted from hardwood or aluminium offer excellent durability on site. Professional brands like Hultafors maintain strict manufacturing tolerances, often within 0.1mm, essential for high-quality joinery where minor deviations become visible.

Blade Length: Choose blade length based on typical workpiece dimensions. Longer blades provide more reference surface for larger materials, whilst compact models offer better portability for tight spaces.

Ergonomics: Contoured or textured handles improve grip during extended use, particularly important when working with gloves or in dusty conditions. Clear, deeply etched markings remain legible even when the tool becomes dirty.

Investment Value: Quality mitre squares outlast budget alternatives and maintain accuracy throughout years of professional use, making them worthwhile investments for tradespeople demanding consistent precision.

Frequently Asked Questions

Can I use a mitre square for angles other than 45 degrees?

No, mitre squares are specifically designed and permanently fixed at 45 degrees. For other angles, you'll need an adjustable bevel or sliding bevel gauge that can be set and locked to any desired angle.

How do I verify my mitre square remains accurate?

Mark a 45-degree line along a straight edge, then flip the mitre square over and mark from the opposite side. If both lines align perfectly, your tool is accurate. Any discrepancy indicates the square should be replaced, as these tools cannot be adjusted.

What's the difference between a mitre square and a combination square?

A mitre square is permanently fixed at 45 degrees for dedicated mitre work, whilst a combination square features a moveable head with multiple angle faces and additional functionality. Mitre squares offer superior robustness for repeated 45-degree checking and marking tasks.