FOWLER TELESCOPING GAGE SET WITH TITANIUM COATED CONTACT POINTS - 52-470-000 CONTACT POINTS ARE MADE OF HARDENED STEEL THAT IS PRECISION GROUND AND TITANIUM COATED. DOUBLE ACTION RIGID HANDLES WITH SELF-CENTERING FEATURE FOR QUICK CHECKING OF INSIDE MEASUREMENTS. CONSTANT SPRING TENSION FOR UNIFORM FEEL. GAUGE SET COVERS A MEASURING RANGE OF 5/16"" TO 6"" WITH MEASURABLE DEPTHS OF 4"" TO 5"". INCLUDES A FITTED VINYL CASE FOR STORAGE.