Starrett 657A Magnetic Base Without Indicator

The Starrett 657A Magnetic Base is a precision-engineered holding fixture designed for use with dial indicators, test indicators, and other measuring instruments in machine shops, tool rooms, and manufacturing environments. Sold without an indicator, it pairs with a wide range of Starrett and compatible third-party gauges.

Featuring a powerful on/off magnetic base, the 657A provides a secure, vibration-resistant hold on ferrous surfaces, allowing for hands-free indicator positioning during setup, inspection, and quality control operations. The flexible articulating arm delivers a wide range of positioning options, enabling the indicator to be placed precisely where needed.

Key Features:

• Strong on/off magnetic base for secure attachment to ferrous metal surfaces
• Flexible articulating arm for versatile indicator positioning
• Fine adjustment capability for precise indicator placement
• Compatible with standard dial indicators and test indicators
• Sold without indicator — base only
• Durable construction built to Starrett's professional-grade standards
• Ideal for machine tool setup, quality inspection, and surface plate work

The Starrett 657A is a reliable, shop-proven magnetic base that delivers the stability and flexibility demanded by machinists and quality control professionals. Whether used on a lathe, mill, surface plate, or inspection fixture, it provides a dependable foundation for accurate measurement.