Fowler 150-175mm Outside Metric Micrometer 52-248-007-1 Series No. 52-248 offers Fowler standards of fine quality and accuracy. A variety of sizes covers a range of measuring applications. Hammertone blue baked enamel finish Microfine graduations on satin chrome finish and carbide tipped measuring faces Ratchet stop thimble for exact and repetitive readings Spindle thread is hardened, ground and lapped Anvil & spindle hardened and precision ground with microlap finish on tips All micrometers meet or exceed U.S. Federal specifications for accuracy Standard included Includes a wrench and case