Feature●Keep Your Indicators Close By - No more searching for your indicator! This magnetic base holder will keep it close at hand, making it easy to grab and use when you need it.●Use With All Starrett Indicators - The Starrett 657AA Magnetic Base Indicator Holder is perfect for use with all Starrett Test, Back-Plunger, AGD, Dial, and Miniature-Dial Indicators. It also accommodates similar indicators of other manufacturers.●Make A Wise Choice - Our base holders are designed to withstand the toughest environments, so you can be confident that your measurements will be accurate every time.●Base Holder - The base holder is designed to provide a solid foundation for your indicator or gage. Its made of durable steel and is compatible with most instruments on the market.●Built To Last - Our holders are made from high-quality materials that are built to last. You can trust us to provide you with a product that will meet your needs and exceed your expectations.Description The Starrett 660 Magnetic Base Indicator Holder is compact and versatile, with three adjustable pivots controlled by a single knob for fast and easy indicator positioning.