iGAGING professional precision measuring tool iGAGING 8" high stainless steel stands with rack and pinion design allows Super high accuracy comparison measurements. Features: serrated ceramic working surface provides a stable and accurate reference base working area: 3-1/4 inch x 3-1/4 inch (85mm x 85mm). polished chrome Column with rack and pinion adjustment for fine measurements accepts all electronic and dial indicator with 3/8 inch mounting.    

The reference base has Grade A flatness.

(Digital indicator and gauge block not included. We do have a set that does include the indicator. See 400-C85-128)