Product Description Micrometer for measuring gear tooth Product Specification Model Number Range Reading FM 25 0-25 mm 0.01mm FM 50 25-50 mm 0.01mm FM 75 50-75 mm 0.01mm FM 100 75-100 mm 0.01mm FM 125 100-125 mm 0.01mm FM 150 125-150 mm 0.01mm