This Mitutoyo micrometer is the world first 0.1 µm (5µ_in) resolution handheld micrometer. Exceptional accuracy and resolution make this instrument ideal for SPC applications, enabling even very tightly toleranced dimensions to be effectively controlled. ABSOLUTE System scale for error free, high-speed measurement. The highly stable frame incorporates a heat shield to preserve accuracy over extended measuring sessions.A ratchet thimble applies highly consistent measuring force to guarantee repeatable results. Maximum Permissible Error J MPE.