craftsmanship: machinist square has surface color and smooth base surface, as as material; Without trace, it will let you have a and comfortable use experience Proper size:these machinist squares rules are include 2 inch , 3 inch , 4 inch and 5 inch squares, The proper size will the accuracy of the measurement data, also allow you to hold the rule easily and firmly work performance: the testing machinist square can be applied to engineering measurements, it can accurately measure the vertical deviation of internal and external angles; The has no difference, assuring the measurement data without error Easy to identify: You can quickly identify the data to you can easily measure each right , highly setup and layout work, all have the same beam and blade width and thickness, which makes it possible to use in combination Safe and : this precision square tool use rivet links design, so it will not endanger your safety; Besides, chassis is heavy, and stable, as as not inclined, so the measurement data is more and easy to read. Material:metal colour:Silver Contents: 4 x Square Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.