Brown & Sharpe 599-7764 Miti-Mite Heavy-Duty Magnetic Base, Ball and Socket Post, 0.75" Height, 1.25" Width, 4" Length Compatible with Brown & Sharpe dial and dial test indicators, as well as similar indicators from other manufacturers Grips horizontally, vertically, and upside down for versatility V-base grips to flat and rounded surfaces Heavy duty always-on magnet for secure attachment and adhesion to a variety of equipment and work surfaces Ball and socket joint in the base post allows for a wider range of movement than a typical pin joint