Here we have a Central 6415. A Magnetic base for a Dial Indicator set.
Central Tools Magnetic Base For A Dial Indicator #233 With Magnet Switch
Allstar Performance Magnetic Base - Allstar Dial Indicator Kits - Each ALL96416
Central Tool Co Clamp Type Dial Indicator Set 6400 0 - .200" Range Made in USA
Central Tools 3D107 IP54 Rated Dial Indicator Set
Central Tools 6410 Long Range Dial Indicator Set, 1" Range, 0.001" Graduation
Central Tools 3D101 0 To 1 In. Dial Indicator Set With Magnetic Base
