DIY Frequently Asked Questions / Combination Square')">
Has a grooved blade and head that can be adjusted (by loosening the thumbscrew) to many locations along the 12” blade to provide different measurements and for scribing.
One edge of the head (which is usually metal or plastic) has a 90-degree fence for crosscutting while the other has a 45-degree angle for use as a miter square.
The head also contains one level vial to check for level and plumb and a scratch awl for scribing.
Some combination square sets are available with an attached protractor that is movable throughout 180º for setting the blade at any angle within that range.
DIY Frequently Asked Questions / Combination Square')">
Has a grooved blade and head that can be adjusted (by loosening the thumbscrew) to many locations along the 12” blade to provide different measurements and for scribing.