Features:Each leaf of the thickness gage is made of fine tempered steel, hardened.Straight Blade (1/2" width at tip)26 leaf set.0015" , .002" , .003" , .004" , .005" , .006" , .007" , .008" , .009" , .010" , .011" , .012" , .013" , .014" , .015" , .016" , .017" , .018" , .020" , .022" , .024" , .028" , .030" , .032" , .035" 3" lengthThe exact thickness is marked on each leaf. Steel case with lock nut.Meets U.S. Federal Specifications.