Universal Indicator Holder with No. 657 Magnetic Base
COMPLETE ASSEMBLIES
The working area is within a hemisphere having a radius of approximately 12" (300 mm)
The very sensitive fine- adjustment is located on the magnetic base to eliminate indicator deflection when it is being adjusted
Model 657-3 Universal Indicator Holder Arm Assembly can also be used on Model 659P Base using Model 659 Thread Adapter, Model PT18318