Starrett 657P Magnetic Base for Dial Indicators and Test Instruments

The Starrett 657P Magnetic Base is a precision magnetic holding fixture designed to securely position dial indicators, dial test indicators, and other measuring instruments during inspection and machining operations. Built to the exacting standards Starrett is renowned for, this magnetic base provides a stable, vibration-resistant platform on any ferrous metal surface.

Key Features:

• Powerful on/off magnetic base with rotating switch for easy activation and deactivation
• Fine adjustment knob allows precise positioning of the indicator arm
• Rigid construction minimizes flex and deflection for accurate readings
• Universal dovetail fitting compatible with standard indicator holders and accessories
• Durable cast construction with a corrosion-resistant finish
• Strong magnetic holding force for reliable attachment to machine tables, surface plates, and other ferrous surfaces

The 657P is sold as the magnetic base only and is an ideal replacement base or standalone component for use with Starrett's 657 series indicator holder systems. It is widely used in machine shops, quality control labs, and manufacturing environments where reliable, repeatable indicator positioning is essential.