•The squares are hardened and ends are lapped to 90° angular accuracy with the cylinders as follows: 6 square to .00010 12 square to .00015 Includes fitted case
•These cylindrical squares are used in surface plates as a 90° reference angle
•Can be used for checking squares, height gauges and many other instruments.
Full Description
| Type | Cylinder | Shape | Square | 
| Cylinder Diameter | 4" | Included | Fitted case | 
| Accuracy | 0.00010" | Weight | 30 lbs |