• Hammertone blue baked enamel finish. • Microfine graduations on satin chrome finish and carbide tipped measuring faces. • Diameter of measuring faces: .256" • Ratchet thimble • Quick, easy zero adjustment on sleeve • Positive lever locking clamp • Spindle thread hardened, ground and lapped for ultimate accuracy • Anvil & spindle hardened and precision ground with microlap finish on tips • Meets or exceeds Federal accuracy specs. • Includes a wrench and case