Starrett 657-1, 657-2 Magnetic Base Universal Indicator Holders

with triple jointed arm and fine adjustment

This versatile indicator holder has three pivots available for positioning the indicator where needed. All pivots are controlled by one tightening knob. It will hold:

• Any indicator with a 3/8″ (9.5mm) stem (such as our 25, 650 and 651 Indicators)
  
• Any indicator with a standard dovetail mount (such as our 708, 709, and 811 Indicators)
  
• Any indicator with a 1/4″ (6.3mm) shank (such as our 196 Indicator)
  
• Any indicator with a 3/16″ (4.7mm) shank (such as our 708, 709, 811 and 711 Indicators)
  
• Any indicator with a body clamp (such as our 711 Indicators)
  
• The working area is within a hemisphere having a radius of approximately 12″ (300mm)
  
• The very sensitive fine-adjustment is located on the magnetic base to eliminate indicator deflection when it is being adjusted
  
• The 657-3 Universal Indicator Holder Arm Assembly can also be used on the 659P Base using the 659
• Thread Adapter, PT18318

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