RSA Adjustable Rafter Square Set


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The metric RSA300 and RSA180 Adjustable Rafter Squares make a great team for woodworkers and roofers. The largest metric Rafter Square is ideal for projects with big timbers and trusses, while the smaller RSA180 fits nicely in most tool belts and will find a use in many jobs on site.

Developed for quick and simple marking/laying out of roof trusses, both have the smart adjusting fence that locks in position for speed, ease and repeatability.

The RSA range are manufactured in-house from the highest quality European T6 4mm thick aluminium. We CNC machine each tool to tight tolerances, with right angle precision of +/- 0.008° along the entire length. 

The RSA range have an anti-glare anodised surface for outdoor use on sunny days. The laser marked graduation rulers and parallel scribe scales are recessed in pockets to avoid wear over time.

The degree lines are deep engraved so they won't rub off, and as they are made on the same CNC milling machine that profiles the square, the level of precision is excellent. 

The adjustable silver anodised aluminium fence is also CNC machined and is fixed to the tool via nylon 66 bearings for smooth operation that snaps back to exactly 0°. The fence can be locked in place with a stainless steel thumb screw for repeatable cuts and marking super precise birds mouths, without any repeat measuring required.

There are several features and marking gauges on the face of the tool, including;

  • 175 and 300mm rules (plus a smaller rule along the fence edges)
  • Fixed deep engraved protractor gauge along the hypotenuse edge
  • Rise and run protractor gauge (in degrees and fractions)
  • Scribe lines for common timber dimensions
  • 1/3rd scribe marks for common timber widths
  • Parallel slots
  • Rise per metre of run table (RSA300)
  • Rafter length per metre of run table (RSA 300)
  • Constructed from high quality 4mm aluminium
  • High precision CNC machine profiled
  • Adjustable CNC machined aluminium fence
  • Anodised protective finish
  • CNC laser marked graduation scales
  • Made in Great Britain

The precision and workmanship from our manufacturing process is unrivalled and next level compared to mass produced, laser cut or cast rafter squares. The RSA Adjustable Rafter Squares are built to an extremely high standard. These are made for tradespeople who are looking for exceptional durability, design and quality from their tools. 

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