Fireball Tool Lumber Maximus Clamp 2" × 4" – Single Clamp Set

Turn an ordinary 2×4 into a heavy-duty, virtually unlimited-length clamp with the Fireball Tool Lumber Maximus Clamp.

Inspired by Fireball's heavy-duty Maximus fabrication clamp, the Lumber Maximus is designed specifically for use with standard 2×4 lumber. Simply slip the clamp onto your board, wedge it securely into position, and you've got a powerful clamping system with a working length determined by the lumber you choose.

Need a 4-foot clamp? Grab a 4-foot 2×4.

Need an 8-foot clamp? Grab an 8-footer.

Working on something even bigger? Go as long as the job requires.

It's a simple, versatile clamping solution for fabrication shops, woodworking, construction, assembly, jobsite work, and oversized projects where conventional bar clamps just aren't long enough.

Turn a 2×4 Into a Bar Clamp

The Lumber Maximus is designed around one of the easiest materials to find anywhere: standard 2×4 lumber.

Fireball designed the clamp for lumber that's typically approximately:

1.5" × 3.5" actual dimensions

Instead of buying multiple expensive extra-long bar clamps, use inexpensive 2×4 lumber as the backbone of the system.

Your piece of lumber determines the overall clamping length, giving you the freedom to build a clamp around the project.

Go as Long as the Project Requires

One of the biggest advantages of the Lumber Maximus is that you're not locked into a fixed clamp length.

Use it for:

• Large frames

• Cabinets

• Doors

• Furniture

• Table assemblies

• Construction projects

• Woodworking

• Large glue-ups

• Jobsite assembly

• Straightening

• Temporary bracing

• Oversized fabrication projects

Simply select a 2×4 long enough for the job.

Install It Without Access to the End of the 2×4

This is one of the smartest features of the Lumber Maximus.

You don't have to slide the clamp onto the end of the board.

The clamp can slip directly over the middle of a 2×4, allowing it to be installed even when the ends of the lumber aren't accessible.

That's especially useful on construction sites and large assemblies where the 2×4 may already be installed or surrounded by other material.

Slip it over the board, move it into position, and wedge it securely in place.

Wedge Design Accommodates Lumber Variations

Anyone who has worked with construction lumber knows that not every 2×4 is exactly the same.

Actual dimensions can vary, and moisture content can change the size and shape of the board.

Fireball accounts for this with a wedge shape on the front and back of the clamp body.

The design helps accommodate dimensional variations between different pieces of 2×4 lumber.

250–500 lb of Clamping Force

Don't let the lumber backbone fool you—the Lumber Maximus can generate substantial clamping pressure.

Depending on the:

• Condition of the lumber

• Length of the clamping setup

• Distance between clamping points

• Overall project configuration

Fireball states that the Lumber Maximus can achieve approximately 250–500 lb of clamping force.

That's plenty of pressure for a wide range of woodworking, construction, assembly, and shop applications.

Clamp or Spread

The Lumber Maximus isn't limited to pulling parts together.

Reverse the direction of the clamp and you can also use the system for spreading.

That gives you one tool capable of applying force in either direction.

Use it to:

Clamp material together
or
Push material apart

That versatility can be particularly useful for assembly, alignment, straightening, construction, and repair work.

Use It as a Wood Jack

The Lumber Maximus can also be used as a wood jack.

That opens up even more possibilities for positioning, lifting, pushing, or aligning material during construction and assembly work.

Combined with the ability to use practically any length 2×4, this makes the Lumber Maximus considerably more versatile than a conventional fixed-length bar clamp.

Large Swiveling Footpad

The Lumber Maximus features a large footpad that works with both flat and round material.

That allows the pressure pad to better adapt to the surface you're clamping instead of limiting the tool to flat stock.

It's useful when working with:

• Flat boards

• Frames

• Panels

• Round material

• Irregular assemblies

• Construction components

Die-Cast Aluminum Body

The clamp body is manufactured from die-cast aluminum, keeping the tool relatively lightweight while still providing the structure required for substantial clamping pressure.

A steel insert supports the spindle, reinforcing this critical load-bearing area.

It's a smart combination of materials that keeps the clamp manageable while adding steel where it's needed.

Lock It Into Position

To install the Lumber Maximus, slip it over your 2×4 and push the arm up or down to wedge it into place.

For applications where you want the clamp more permanently secured to the lumber, Fireball provides side holes that allow you to install a nail or screw.

That gives you the choice between a quick temporary setup or a more secure installation.

Fine-Tune With a 6mm Hex Key

Need a little more control over your clamping pressure?

A socket at the top of the handle accepts a 6mm hex key, allowing you to precisely tighten the clamp.

This gives you additional leverage and control when dialing in the final clamping pressure.

Built-In Nail Removal Groove

Fireball even incorporates a nail-removal groove into the design.

It's a small detail, but a useful one for a tool that's likely to spend plenty of time around construction lumber and jobsites.

Your 2×4 Becomes the Consumable

Fireball intentionally treats the 2×4 as a consumable part of the clamping system.

Because the clamp wedges securely against the sides of the board, it may create small dents in the lumber during use.

For most applications, that's a worthwhile tradeoff for being able to turn inexpensive, readily available construction lumber into a customizable clamping bar.

If maintaining the cosmetic appearance of the 2×4 is important, keep this in mind before clamping.

Key Features

• Fireball Tool Lumber Maximus Clamp

• Designed for standard 2×4 lumber

• Works with typical actual dimensions of approximately 1.5" × 3.5"

• Use virtually any length 2×4

• Creates a customizable long-reach bar clamp

• Can install directly onto the middle of the lumber

• No need to slide the clamp on from the end

• Wedge design accommodates variations in lumber dimensions

• Approximately 250–500 lb of clamping force

• Can be configured to clamp or spread

• Can be used as a wood jack

• Large footpad works on flat or round material

• Die-cast aluminum clamp body

• Steel spindle insert

• Side holes allow attachment with a nail or screw

• 6mm hex socket for precise tightening

• Integrated nail-removal groove

• Patent-pending Fireball Tool design

• Fireball Tool SKU: F5-MCL204

What's Included

This listing includes:

1 × Fireball Tool Lumber Maximus Clamp Set

2×4 Lumber Is Not Included

The customer supplies the 2×4 used as the clamp bar.

This is what gives the Lumber Maximus its flexibility—you choose the length of lumber that makes sense for your project.

Build the Clamp Around the Project

Extra-long conventional clamps can get expensive fast, and they still lock you into one specific length.

The Fireball Tool Lumber Maximus Clamp takes a different approach.

Use readily available 2×4 lumber as your clamp bar, choose whatever length the job requires, install the Lumber Maximus, and put the clamping pressure where you need it.

When the next project is longer, grab a longer 2×4.

One clamp system. Inexpensive lumber. As much reach as the job requires.

NOTE: 2×4 lumber is required and is not included. Use of the clamp may leave small dents in the lumber.