For Checking Squares, Height Gages and Other Instruments
Used on Surface Plate as a 90° Reference Angle
Solid One Piece Construction
Granit Plate Not Included
-Square: 3"
-Height: 7"
-Made of Steel and Hardened to RC 58-60”
-Precision Ground
-Squareness, Flatness and
Parallelism within .0001 All Sides
-The Bottom is Lapped to 90°
Angular Accuracy with
the Sides within .0001 or Better
