Mitutoyo external micrometers ratchet 0 25mm 001mm25 50mm 001mm mitutoyo 103 138h this external micrometer ratchet 25 50mm 001mm from mitutoyo is the ideal lightweight tool for engineering and machining both at the workplace and home equipped with a range of rich features including the tungsten carbide tipped anvils positive locking clamp and enamel frame while the thimble and sleeve have a satin chrome finish mitutoyo 103 138h extrenal micrometer ratchet 25 50mm 001mm