100mm Set Square 4" Inch Engineers Polished Steel Blade - High Quality Tools
A machinist square or engineer's square is the metalworkers' equivalent of a try square. It consists of a steel blade inserted and either pinned into a heavier body at an angle of 90°. In the accompanying image, there is evidence of pinning at the intersection of the blade and body: the heads of three pins are visible as dark circles. A small notch has been added to the inside corner of the square to prevent small particles from accumulating and affecting the square's reading. This notch is typical of machinist squares and is occasionally found on carpentry squares as well.
Stock: 75x21x11mm Approximate
Overall length:130mm Approximate
In use, the body is aligned against the one edge of the object and the blade is presented to the end or body of the object. If the end is being checked, then a strong light source behind the square will show any mismatch between the blade of the square and the end of the object. The purpose of this action is to either check for squareness or to mark out the body of the work piece.
These squares have been introduced to meet the demand of accurate Tools for use by the Engineer of production work.