Featuring clear, easy to read numbers on a digital counter, Fowler's digit counter micrometers are an economical, fast and easy-to-use addition to the machinist's toolchest, the shop floor or in the QC area. Hammertone grey baked enamel frame with heat insulated frames. Microfine graduations on satin chrome. Anvil and spindle hardened and precision ground with microlap finish on carbide tipped measuring faces. Spindle thread is hardened, ground and lapped. Diameter of measuring faces: .256" Ratchet stop thimble on all models. Quick, easy zero adjustment on sleeve. Positive locking nut on spindle. Accuracy: .00016" Parallelism: .00005" for 0-1" Flatness: .00003" 0-1" Range .0001" Graduation Meets or exceeds Federal accuracy specs. Includes wrench and fitted case.