Starrett combination squares consist of a photo-engraved, hardened and tempered steel rule (or blade) on which is mounted on an adjustable square head. 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 Starrett tools is that they are accurate and will last. As the name indicates, these tools can be used for many different purposes – a complete substitute for a whole set of common solid try squares, a 45 degree miter, a depth gage, a height gage, a marking or scribing gage, a level, a plumb and, by withdrawing the blade, it can also be used as a precision rule. This saves littering the workbench with too many tools, each being necessary but may be used less. This results in the goal of all good craftsmen – better accuracy and greater efficiency. The combination square with center head is a basic combination set. The center head is a convenient and accurate way to find the center of round work. Complete combination sets feature the combination square with a center head and with either a reversible or non- reversible protractor. Details of the protractors are also included in the Protractor and Angle Measurements Section of this catalog. Combination square Combination set Combination square with head Combina tion Squares 267 S quares