150 mm or 100 mm
What Comes in the Kit?
Mega Square
Monster Square
150 mm or 100 mm
Mantis Grip Pliers
200 mm or 280 mm
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.
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.
Monster Square
Use the square to locate tabs precisely
Unlike a ruler, it gives you reference in space and corrects roll so parts line up right.
Set your distance, lock it in with pliers
Now your material runs perfectly parallel and stays put through the whole setup.
Use it to set 90° or 45°
Position your parts fast and clamp them solid for square, accurate weld-ups every time.
Use tabs to prevent twist
Hold parts square and steady through the final weld. Bonus: They grip round tubing too.
Clamp it from any side
Multiple faces give you fast, rigid hold without wasting time on tricky setups or uneven surfaces.
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.
Square 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
Mantis Grip Pliers
These are the locking pliers I've always wanted. Instead of traditional designs with two medium size arms, we have one big arm and one small arm.
The big arm lets you step over material for clamping. The small arm gets into compact spaces.
By flipping the plier right direction, it also keeps a low profile so you have less of the clamp arm in your way.
There's a threaded bolt that acts as a clamping surface or an easy way to customize your tool for special project.
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.