- For use with all Starrett Test, Back-Plunger, AGD, Dial and Miniature-Dial Indicators
- Will accommodate similar indicators from other manufacturers
- Secure test indicators with a powerful, permanent magnetic base
- Holds firmly to steel or iron surfaces, push button switch turns magnet force on or off
- Includes: magnetic base #657P, upright base post #657G, snug #657S, rod #657X, indicator attachment
- #657Y and snug #PT18724
