Starrett 57B Full Sized Surface Gage Micrometer which is shown on the

which is shown on the dial indicator

Measures inside

Titanium Nitride (TiN) coating is applied to the sliding surface to increase wear resistance

Adjustable contacts on thimble end

Each gage has five different gaging surfaces for both convex and concave radii

Starrett 57B Full Sized Surface Gage Micrometer which is shown on theItem Description Spindle length: 9 & 12" Spindle length: 255 & 300mm Base size: 3 x 2 9 16" Base size: 75 x 65mm Full size surface gage with attractive finish Two frictionally held gage pins in the steel base which can be pushed down and used aginst the edge of a surface plate or T slot for linear work California Residents: Click here for Prop 65 warning