52-229-220 Fowler Micrometer Set 100mmFowler Micrometer Set Fowler's Swiss Style micrometers are made exclusively for Fowler. A great value they offer the same fine features and quality that you expect from comparable tools but are offered at a fraction of the cost. Features include 0 100mm Measuring Range 0. 01mm Graduations Unique friction design allows one hand operation Swiss style design, balance and quality Friction Ratchet thimble assures you of consistent readings at all times.