The original Mega Square is available in a 300 mm, 200 mm, 150 mm & 100 mm sizes with two material choices: Cast Iron (FE) with Dragon Scale Coating or Cast Aluminum (AL). All Mega Squares feature a stiff “flange and web” design that is fully machined on all outer edges with tapped holes for mounting tabs.
Patented Design
Open 90-degree insets and deep corner reliefs give welding torches unhindered access to execute crucial tack welds on inside or outside corners.
Built-in 1/4-20 (6.35 mm) tapped holes on both sides support thumbscrew alignment tabs to create a reference shelf that aligns parts and prevents twisting.
The cast iron option resists warping under heavy clamping. Its proprietary Dragon Scale coating repels weld spatter without anti-spatter sprays.
The unique inner web lets you cradle round pipes like a heavy-duty V-block. You can easily clamp tubing down for flawless perpendicular welds.
Replacing slow manual jigs with this square turns a day of tedious fit-up into a 15-minute task, easily paying for itself in shop labor savings.
The lightweight aluminum variant is ideal for mobile fieldwork. It acts as a massive heat sink for thin metals and remains completely rust-proof.
Machined flat to tight tolerances, these squares beat standard hardware speed squares.
Intelligent edge geometry enables rapid 45° and 135° setups. Add edge alignment pins to set up precise parallel, 30°, or 60° angles repeatedly.
Size: 300 x 300 x 76 mm
Flange: 76 mm
Weight: 4.5 kg
Weight: 10.5 kg
Size: 200 x 200 x 38 mm
Flange: 38 mm
Weight: 1.2 kg
Weight: 3.5 kg
Size: 150 x 150 x 38 mm
Flange: 38 mm
Weight: 1.0 kg
Weight: 1.6 kg
Size: 100 x 100 x 38 mm
Flange: 38 mm
Weight: 0.4 kg
Weight: 1.0 kg
| Aluminum (AL) |
| Pros
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| Cast Iron (FE) + Dragon Scale |
| Pros
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Our innovative tabs make welding tables optional.
We reinvented the game—just twist and go. No more hunting for the right tool!
Snap on edge alignment pins to any square and get a handy overhang for lining up on different surfaces. Depending on the square, you can set it to 90°, 45°, parallel, or even 60° and 30° angles.
