Source：amazon.com
Swanson Tool7-inch Speed Square Layout Tool$9.98
Swanson Tool
$9.987-inch Speed Square Layout Tool
When working with home DIYs, the importance of straight lines and perfect measurements cannot be overstated.
A square is the easiest way to make sure you're cutting straight lines when working with wood. If you have a 2x4 piece of wood, for example, and need to cut it into four pieces to make a box, you can align your speed square with the length of the wood and trace a line at exactly 90 degrees for a straight cut.
You don't need to invest much for a good square; just make sure it has a lip on one of its edges for ease of use, like this 7-inch Swanson square.
A square is the easiest way to make sure you're cutting straight lines when working with wood. If you have a 2x4 piece of wood, for example, and need to cut it into four pieces to make a box, you can align your speed square with the length of the wood and trace a line at exactly 90 degrees for a straight cut.
You don't need to invest much for a good square; just make sure it has a lip on one of its edges for ease of use, like this 7-inch Swanson square.