JEGS adjustable magnetic dial indicator base is designed for superior holding power and ease of use. Accepts all AGD dial indicators with lug backs and dial test indicator stands. Features a powerful, 110 lb. (50 kg), magnet with on/off lever release so there is no risk of marring the surface. Includes universal horizontal and vertical plane adjustment with the built in quick adjustment clamp. Can be used with JEGS dial indicator 555-81605 (sold separately).