Contractor Grade Squares That Earn Their Place in Your Bag
For most contractors, the Swanson Tool Company Speed Square is the top pick because it combines a durable aluminum build with a layout of common angles, making it ideal for quick rafter and stair calculations. Its main limitation is that it is not designed for extremely large layouts, but its versatility and ease of use make it a staple.
A good square is more than a measuring tool. It is a guarantee that your cuts are square, your angles are true, and your structure stands straight. For contractors, the square is an extension of the hand, used hundreds of times a day for layout, marking, and checking.
With so many types and brands available, finding the right one for your specific tasks can be overwhelming. This roundup breaks down the best squares for contractors, focusing on durability, accuracy, and functionality that professionals demand.
How to choose
The top picks, ranked
Swanson Tool Company Speed Square
The classic Speed Square is a contractor’s essential. It features a durable aluminum body, a pivot point for marking angles, and a built-in level. It doubles as a saw guide and protractor, making it incredibly versatile.
Pros
- Lightweight and durable aluminum
- Multiple functions in one tool
- Easy to read markings
Cons
- May not be precise for large layouts
- Paint can wear off over time
Johnson Level & Tool Framing Square
A traditional framing square, also known as a steel square, is indispensable for laying out stairs, rafters, and ensuring square corners on large structures. This model is stamped with clear graduations and features a handy rafter table.
Pros
- Large size covers wide boards
- Includes rafter table for quick reference
- Sturdy steel construction
Cons
- Heavy and bulky
- Markings may be hard to see in low light
Empire e2785 Combination Square
A combination square offers a level, a try square, a miter square, and a depth gauge in one tool. Empire’s version features a cast zinc head and a hardened steel blade that resists wear. It is a favorite for finish work and precise layout.
Pros
- Multi-functional
- Accurate 90 and 45 degree measurements
- Blade locks securely
Cons
- Smaller capacity for large layouts
- Can be bent if used as a hammer
Stanley STHT1-08558 Quick Square
Stanley’s version of the speed square offers similar functionality to the Swanson at a lower cost. It is made of impact resistant plastic, making it lighter and less expensive, but still durable enough for daily job site use.
Pros
- Affordable price point
- Lightweight and easy to carry
- Includes common angle markings
Cons
- Not as durable as aluminum
- Can warp under extreme heat
Milwaukee 48-22-5108 12-Inch Combination Square
Milwaukee’s combination square is built to withstand harsh job site conditions. It features a forged steel head and a stainless steel blade that will not rust. The etched graduations are easy to read even after years of use.
Pros
- Extremely durable construction
- Corrosion resistant blade
- Precise measurements
Cons
- Higher price
- Heavier than other combination squares
Irwin Tools Combination Square
Irwin offers a reliable combination square at a budget friendly price. It has a cast iron head and a tempered steel blade that is both straight and durable. The markings are etched to resist fading.
Pros
- Good value for the price
- Sturdy and accurate
- Scribing pin included
Cons
- Not stainless steel
- Some users report blade slippage
Starrett 13H-12-4R Combination Square
For the contractor who demands the highest level of accuracy, Starrett is the gold standard. This combination square features a hardened steel blade with satin chrome finish and a reversible protractor. It is a precision instrument.
Pros
- Unmatched accuracy
- Smooth sliding head
- High quality construction
Cons
- Very expensive
- Overkill for general framing
The lineup, side by side
| # | Model | Material | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | Swanson Tool Company Speed Square | Aluminum | General layout and rafter cuts | 9.6 | Check price |
| 2 | Johnson Level & Tool Framing Square | Steel | Large framing and roofing projects | 9.2 | Check price |
| 3 | Empire e2785 Combination Square | Zinc head, steel blade | Precision marking and depth measurement | 9.0 | Check price |
| 4 | Stanley STHT1-08558 Quick Square | Plastic | Quick marking and cutting guides | 8.7 | Check price |
| 5 | Milwaukee 48-22-5108 12-Inch Combination Square | Forged steel head, stainless steel blade | Heavy-duty professional use | 9.1 | Check price |
| 6 | Irwin Tools Combination Square | Cast iron head, steel blade | General purpose layout | 8.5 | Check price |
| 7 | Starrett 13H-12-4R Combination Square | Hardened steel, satin chrome | Precision work and finish carpentry | 9.3 | Check price |
Questions worth asking
What is the difference between a speed square and a combination square?
A speed square is a triangular tool used primarily for marking angles and as a saw guide. It is compact and quick to use. A combination square has a ruler blade and a head that can be set at 90 and 45 degrees, and it often includes a level. It is more versatile for measuring depth and checking squareness.
Can I use a plastic square for professional work?
Plastic squares are not recommended for heavy professional use because they can warp or break. For consistent accuracy, a metal square is a better investment. However, if you need a lightweight backup or for occasional use, a plastic square can suffice.
How do I verify that my square is accurate?
To check accuracy, draw a straight line on a board, then use the square to draw a perpendicular line. Flip the square over and draw another line from the same point. If the two lines align, the square is accurate. If not, it may be bent or out of true.
What is the best square for framing rafters?
For framing rafters, a speed square is often the best choice because it has a pivot point and a rafter scale that simplifies angle calculations. Some contractors also use a framing square for larger rafter layouts. Both can get the job done, but speed squares are more portable.
Do I need both a speed square and a combination square?
Many contractors carry both because they serve different purposes. A speed square is great for quick layout and cutting guides, while a combination square is better for checking squareness, measuring depth, and setting up saws. If you do a variety of tasks, having both is beneficial.
What is the best material for a square: aluminum or steel?
Aluminum squares are lighter, rust resistant, and easier to handle, but they can bend if dropped. Steel squares are more rigid and durable, but they are heavier and can rust if not cared for. For most job site work, aluminum offers a good balance, while steel is preferred for extreme durability.
How long should a square last?
With proper care, a high quality metal square can last for many years, even decades. Avoid using it as a hammer or pry bar, which can bend it and ruin its accuracy. Keep it clean and dry to prevent rust.
Are there squares with metric markings?
Yes, many squares feature both imperial and metric scales. Some models are available in metric only. If you work on projects that require metric measurements, look for a square that clearly shows both systems.
What is a try square used for?
A try square is used to check the squareness of a piece of wood and for marking precise 90 degree cuts. It has a fixed blade set at a right angle to the handle. Combination squares can function as a try square, making them more versatile.
Can a square be repaired if it becomes inaccurate?
In many cases, a square that has been bent can be gently tapped back into shape with a hammer. However, if it is severely damaged or warped, it is safer to replace it. Using an inaccurate square can lead to mistakes in your work.
Our take
After comparing the features and build quality, the Swanson Speed Square stands out as the best all-around choice for contractors due to its versatility and durability. For those who need a heavy duty square for demanding projects, the Milwaukee Combination Square offers superior strength. If precision is your top priority, invest in the Starrett, but for most daily tasks, the Swanson will serve you well.
