Recommended for material 50 mm or larger.
What Comes in the Kit?
Mega Square 300 mm
Mega Square 200 mm
Recommended for material 50 mm or smaller.
Locking C-Clamps (2-Pack)
Quick and secure clamping on multiple flat surfaces of our squares.
Edge Alignment Pins (4-Pack)
Get a handy overhang for lining up on different surfaces.
Mega Square
Ultimate Joint Weld Clearance
Open 90-degree insets and deep corner reliefs give welding torches unhindered access to execute crucial tack welds on inside or outside corners.
Threaded Holes & Alignment Tabs
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.
Cast Iron + Dragon Scale Variant
The cast iron option resists warping under heavy clamping. Its proprietary Dragon Scale coating repels weld spatter without anti-spatter sprays.
V-Block Functionality for Tubing
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.
Huge Setup Time Savings
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.
Cast Aluminum Mobile Variant
The lightweight aluminum variant is ideal for mobile fieldwork. It acts as a massive heat sink for thin metals and remains completely rust-proof.
Unmatched Manufacturing Quality
Machined flat to tight tolerances, these squares beat standard hardware speed squares.
Multi-Angle Fixturing Versatility
Intelligent edge geometry enables rapid 45° and 135° setups. Add edge alignment pins to set up precise parallel, 30°, or 60° angles repeatedly.
Material
| Aluminum (AL) |
| Pros
|
| Cast Iron (FE) + Dragon Scale |
| Pros
|
What is Dragon Scale Coating?
Superior Anti-Spatter Properties
Improved Corrosion Resistance
Enhanced Wear Resistance
Steel vs Dragon Scale Coating
Nitride vs Dragon Scale Coating
Full Video (Dragon Scale Demo)
Included Accessories
4 Edge Location Tabs
Our innovative tabs make welding tables optional.
- Align perfectly in seconds
- Skip the $1,000+ flat table
- Tabs attach front or back
4 Tool-less thumbscrews
We reinvented the game—just twist and go. No more hunting for the right tool!
- No hex keys or Allen wrenches
- Adjust tabs with just your fingers
- Quick changes, no tools needed
Edge Alignment Pins
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.
- Pair with Monster Squares to turn them into a speed square for quick layout work
- Mount off the edge of a table for vertical or perpendicular positioning
- Raise the square off the surface to add clearance while fitting or welding full frames
- Pro tip: Marking parallel lines? Pair with our shims for perfect spacing every time.