Key benefits Stable, precise measurements: The red adjustable magnetic base holder gives a secure mounting point for measuring instruments so you get repeatable, accurate results during metalworking and alignment tasks. Fast, reliable setup: The switchable permanent magnet clamps firmly to ferrous surfaces and releases instantly with an on/off switch, saving time and reducing repositioning effort. Versatile compatibility: Designed for dial indicators, lever-type (plunger) dial indicators and similar measuring instruments, so one holder covers multiple inspection and setup jobs. Features Red adjustable holder: Adjustable mounting mechanism allows precise positioning of the indicator without losing stability. Switchable permanent magnet base: Magnetic base uses a built-in on/off magnetic switch to lock to or release from metal surfaces quickly and securely. Simple magnetic control: The clearly accessible on/off switch makes it easy to engage or disengage the magnetic hold, improving user convenience and control. Ideal for metal surfaces: Engineered for attachment to ferrous materials common in machine tools, fixtures and parts. Typical applications Machine setup and alignment: Mount a dial indicator to set up mills, lathes and grinders, check spindle runout and align fixtures. Inspection and quality control: Hold a dial indicator steady for repeatable measurements of flatness, concentricity and part dimensions. Assembly and maintenance: Quickly secure an indicator to diagnose shaft wobble, adjust bearings or verify alignment during repairs. What this product solves Eliminates unreliable temporary supports by providing a firm magnetic anchor for measuring tools. Reduces setup time with an easy on/off magnetic switch, allowing quick repositioning and fewer interruptions. Improves measurement accuracy by minimizing movement or slippage of the indicator during use. Compatibility and use notes Suited for dial indicators, lever-type dial indicators and similar instruments that require a stable magnetic mounting point. Intended for use on ferrous (magnetic) metal surfaces; performance depends on the contact area and surface condition. This magnetic base holder delivers stable positioning, fast magnetic control, and broad compatibility for common metalworking and inspection tasks.