Precision Gages, Rotary Tables and Work Holding Fixtures by A. G. Davis - AA Gage in Detroit, Michig, A. G. Davis - AA Gage has been the industry leader in providing the design and manufacture for precision gages of all types, from small attribute (go/no go) gages, variable (data) gages, standard gages and components, to transfer line, gantry loaded semi-automatic and fully automatic inspection machines.