Lufkin No. 613 Blade Depth Micrometer Designed For Precision Depth Measurements In Narrow Slots, Keyways, Grooves, Recesses, And Other Hard-To-Reach Areas. Features A Precision Ground Micrometer Head, Interchangeable Blade Extensions, And Hardened Measuring Surfaces For Accurate Inspection And Layout Work. Includes Original Wooden Storage Case, Blade Extensions, And Adjustment Wrench. A High-Quality American-Made Precision Measuring Instrument Suitable For Machinists, Toolmakers, Inspectors, And Collectors Of Vintage Lufkin Tools. *PICKUP ONLY*
