Starrett 657D Magnetic Base Without Indicator Heavy-Duty Machinist Tool Holder

The Starrett 657D Magnetic Base is a precision tool-holding base designed for use with dial indicators, test indicators, and similar precision measuring instruments. Built by L.S. Starrett, a trusted name in precision measurement since 1880, this magnetic base provides a stable, reliable foundation for workshop and machining applications.

Key Features:

• Powerful ON/OFF magnetic switch for quick, secure mounting to any ferrous metal surface
• Heavy-duty cast construction for long-lasting rigidity and durability
• Fully articulating arm with multiple locking points for precise positioning of your indicator
• Universal dovetail clamp compatible with most dial and test indicators
• Fine adjustment knob for precise final positioning
• Indicator sold separately — base only

The 657D is ideal for use on machine tools, surface plates, and any ferrous metal workholding surface. Its versatile articulating arm allows the indicator to be positioned exactly where needed, making it a staple tool for machinists, toolmakers, and quality control professionals.