Square Master 160x210x25mm 311-112

This device is ideal for inspecting instrument accuracy, and offers you the following benefits:

• You can use it as the reference for inspecting the accuracy of high-precision measuring instruments and XY tables, such as straightness of each-axis motion and squareness between motions of two axes.
• The squareness and straightness of the four reference surfaces and two side surfaces are finished with ultra-high accuracy