1-2-3 Blocks Instrument Information
A metallic cylinder, containing a handle, machined to a precise diameter. The gage is used to set an air gage by placing it in the air gage and adjusting the gage until it reads the proper diameter.

Common Uses
Numerous applications for setting up a machine, such as a mill, lathe, drill, etc., to machine metals, woods, plastics and other materials.
Common Types
- Size (1-2-3, 2-4-6)
- Holes vs. None
- Threaded vs. Non-Threaded Holes
- Squareness Accuracy
Measurement Parameter
Length (in, cm)
Gage Type
Attribute
Calibration Discipline
Calibration Equipment Used
Gage Blocks