Is your brand not squaring up? Try a Starrett!
Starrett combination squares consist of a photo-engraved, hardened and tempered steel rule (or blade) and adjustable heads. Starrett combination square heads are made of cast iron or forged and hardened steel and are not to be confused with the cheap imitation plastic or die cast heads on the market. The value of the Starrett combination square is that it is accurate, long lasting, and will perform an incredible number of measurements.
There are three types of adjustable heads. The square head has a precision ground 90-degree square face and a 45-degree miter face. It is a highly versatile layout tool for scribing right angles and parallel lines. This type of head allows you to measure as a tri-square, depth gage, height gage, and level. The Center head is an available attachment that provides an easy means of accurately locating the center of a cylindrical or square work piece. The protractor head is another available attachment, which has a revolving turret with direct-reading double graduations, a full 0 to 180 degrees in opposite directions. This permits accurate and quick direct reading of angles above or below the blade. www.starrett.com