Tesa ISOMASTER 00120101 range 0-1'' micrometer graduation .0001'' tungsten carbide facesTESA ISOMASTER Standard Models with Analogue Indication. Slanted full millimetres on the barrel are set apart from the straight half millimetres to virtually eliminate reading errors. The knurled sleeve needs only be reversed to render the friction drive built into the thimble inactive. Tesa ISOMASTER 0120101 range 0 1'' micrometer graduation . 0001'' tungsten carbide faces Micrometer Range 0 1" Type of Micrometer Mechanical Outside Micrometer Select