A square tool is really handy for checking angles and making sure your lines are straight, especially in carpentry and woodworking projects. Common uses include:

• Marking and measuring angles like 90° or 45° on materials
• Guiding saw cuts for accuracy
• Laying out rafters or stairs
• Checking the squareness of joints

Whether you're setting up in the workshop or tackling a home improvement project, these tools help you save time and produce cleaner, more precise work.

To check a right angle using a square tool, simply place the square’s two sides against the surfaces you’re joining.

• If both edges fit snugly, you’re working with a 90-degree angle.
• If there’s a gap, adjust your materials until the square sits flush.

Yes, there are a few differences.

• Speed squares are typically triangular and compact, making them great for marking angles and quick layout tasks.
• Framing squares have a larger, L-shaped design that’s perfect for measuring bigger surfaces and checking squareness on framing or stair work.

Many square tools, especially those made of aluminum or stainless steel, are suitable for both woodworking and metalworking.

• Just check that the tool’s material and markings suit your needs.
• Aluminum squares are lightweight and resist corrosion, while stainless steel squares are often more durable for tougher conditions.

Keeping your square tool clean helps maintain precision.

• Wipe it with a dry or slightly damp cloth after each use to remove sawdust or debris.
• Avoid using harsh chemicals—gentle soap and water are usually safe for most squares.
• Dry thoroughly to prevent rust on metal edges and keep markings legible.