Flat Back, Back Type Flat Back, Compatible with Brand and Series Mitutoyo Dial/Digital Indicators, Compatible with Manufacturer Model No. Mitutoyo Dial/Digital Indicators, For Indicator Stem Size 1.12 in, For Use With Dial Indicators, Digital Indicators, Size 4.5 inx3 inx0.5 in, Compatible with AGD Number Not Applicable, Includes Dovetail Mount Attachments Not Applicable, Includes Fine Adjustment Not Applicable, Material Not Applicable