Fowler Mag Base with Dial Indicator Combo 52-585-115-0 Magnetic Base: Accepts all AGD dial indicators. Base dimensions: 2" x 2-11/32" x 1-13/16" V-base for placing on round surfaces Mounts test indicators with 1/4" posts Magnet features 85 lb. pull On-Off lever release magnet Indicator: Range: 0-1" Graduation: .001" Meets AGD specifications Continuous reading 0-100 Revolution counter Tolerance indicators