657-2 Magnetic Base Universal Indicator Holder with triple-jointed arm

657-2
Starrett Magnetic Base Universal Indicator
Holder 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 and 650 and 651 Series)
• Any indicator with a standard dovetail mount (such
  as our 708, 709, and 811 Series)
• Any indicator with a 1/4" (6.3mm) shank (such as
  our 196 Series)
• Any indicator with a 3/16" (4.7mm) shank (such
  as our 708, 709, 811 and 711 Series)
• Any indicator with a body clamp (such as our 711
  Series)
• 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 Adaptor, PT18318