Contains twenty-five 3″ long by 1/2″ wide blades in varying thicknesses. 0.0015″, 0.002″, 0.003″, 0.004″, 0.005″, 0.006″, 0.007″, 0.008″, 0.009″, 0.010″, 0.011″, 0.012″, 0.013″, 0.014″, 0.015″, 0.016″, 0.018″, 0.020″, 0.022″, 0.024″, 0.025″, 0.028″, 0.030″, 0.032″, and 0.035″. Heavy-duty swivel holder. Sizes etched on each blade. Rounded ends for safety. Precision Brand® Feeler Gage is used in manufacturing and maintenance operations wherever setting close spacing or checking extremely tight tolerances is required.