Starrett, 65055, 25mm, 5/8" Plain Thimble, 0.2362" Dia x 1-1/4" Long Spindle, Mechanical Micrometer Head 4-61/64" Long, Accurate Up to 0mm, Rotating Flat Spindle, 0.4999" Dia x 3/4" Long Stem, Carbide Measuring Face