Starrett Push Button Magnetic Base For All AGD And Dial Test Indicators - 657AA

• Powerful, permanent magnetic base holds firmly to steel or iron surfaces, horizontally, vertically, upside-down.
• Magnetic base. 1-15/16” x 1-5/8 x 1-7/8”. push button on/off switch for one-hand operation.
• Upright base post. 3/8” diameter x 7-7/16” length overall. Starrett No. 57S and No. 58S universal snugs may also be used.