This dial depth gage uses the back-plunger indicator to provide an upward facing dial for easier readout. The operator selects the extension and contact point required, zeros the tool on a master and then reads any deviation of the work directly on the dial. Package dimensions:8.0 ''(L) x6.0 ''(W) x2.5 ''(H) Package quantity: 1 Product Type: PRECISION MEASURING Country Of origin: United States Item Weight 1.6 pounds Manufacturer L.S. Starrett Company Item model number 642MZ Package Dimensions 8 x 6 x 2.5 inches Is Discontinued By Manufacturer No