Leaves made of tempered steel, carefully finished to correct thickness, individually tested and marked. A locking device is furnished. Leaves may be easily removed or replaced. Inch Reading Thickness Gages with Straight Leaves. Range: .0015, .002, .0025, .003, .004, .005, .006, .007, .008, .009, 010, .011,.012, .013, .014, .015, .016, .017,.018, .019, .020, .021, .022, .023, .024, .025, .026, .028, .030, .032, .035"