Monster Square

Fireball Tool EuropeSKU: F6-MOS100-AL-BDK
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Size: 100mm
Material: Aluminium (AL)
Price (excluding tax):
Sale price€40.00

360° View 3D Model (Click & Drag)

Designed to quickly set your work-piece to 90 or 45 degrees

Speed squares and machinist squares are made for visual inspection and checking AFTER setup, the Monster Square is designed to get those parts square in the first place.

Tabs help eliminate twisting and warping in the final work-piece

The machined squares and tabs always create the perfect plane for your work-pieces to rest on. Bonus: The tabs also let you easily hold round tubing.

Clamping is simple with multiple surfaces for quick and rigid attachment

Stop spending your time and focus figuring out clamping strategies, or worse, clamping your straight work-piece to crooked surfaces.


Size (mm) Aluminum (AL) Cast Iron (FE) Flange (mm)

Monster 300

300 x 300 x 76

3.6 kg

10.5 kg


Monster 200

200 x 200 x 38

1.1 kg

3.1 kg


Monster 150

150 x 150 x 38

0.5 kg

1.4 kg


Monster 100

100 x 100 x 38

0.3 kg

0.9 kg


Flange & Web

  • 300 mm squares have a profile similar to an I Beam where the web is centered on the flanges.
  • 200 mm squares are similar to a “C” channel where the web is off to one side of the flange.
Aluminum (AL) Cast Iron (FE) Dragon Scale (FE)


  • Lightweight (Ideal for welding on the go)
  • Resistance to deformation vs aluminum billet
  • Some natural resistance to weld spatter.


  • Can be be damaged if dropped or if used in heavy duty projects.


  • Great for heavy duty projects
  • Excellent resistance to deformation and raising burrs when scratched.
  • Some natural resistance to weld spatter.


  • Heavy (Not ideal for mobile welding)
  • Susceptible to rust.

Fireball’s new Dragon Scale coating provides the corrosion resistance of our previous black oxide finish with the added benefit of enhanced spatter resistance.

It’s spatter resistance needs to be seen to believed; it out performs even the best weld spatter sprays without the use of any sprays.

Included Accessories

4 Edge Location Tabs

Our revolutionary tabs allow you to align your material up so that you don’t even need a welding table! Don’t spend thousands on a flat table, just use our squares! Tighten the tabs onto the front or back of your square and you can immediately get to work. Sure, there are different jigs out there, but can they line your material perfectly in seconds?

4 Tool-less Thumbscrews

But it doesn’t stop there. We reinvented the game by introducing our thumbscrews. Say goodbye to your hex keys and Allen screwdrivers and freely adjust the tabs with only your fingers!

Optional Add-ons

Edge Alignment Pins

Install our edge alignment pins on any square to create a large, overhanging edge which can be used to index the square on a different plane. Depending on the square, this allows you to create edges which are 90 degrees (perpendicular), 45 degrees, parallel, and even 60 and 30 degrees from the edge.

  • Use it with our Monster squares to create a speed square for layout.
  • Use it to hang the square off the edge of a table for working vertical or perpendicular to table surface
  • Use it to elevate the squares off the ground or table for extra clearance when you’re fitting and welding entire frames
  • Tip! If trying to create a parallel edge with the mega square for marking, use our shims to get that perfect distance!

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