Fowler Dial Indicator & Mag Base Set Dial Indicator Features include... 0-1" Travel 0.001" Graduations 0-100 Face Readings 2 1/4" Diameter Revolution Counter Lug Back Carbide Point Magnetic Base Features include... 85 lb. pull magnet Fine Adjustment V-base for mounting on rounded surfaces Magnetic Indicator Back Features include... Use for positioning the indicator on most metal surfaces. Protective coating