Made from 1/2″ wide, C1095 close grain, high carbon spring steel. Material is ground and polished to precision tolerances. Steel feeler gage is used in most general maintenance and tool and die applications. Thickness is clearly marked every 6″ in metric and decimal. Measures 1/2″ wide by 12″ long by 0.003″ thick. Precision Brand® Feeler Gage is used in manufacturing and maintenance operations wherever setting close spacing or checking extremely tight tolerances is required.PRECISION BRAND Feeler Gage is made from 1/2″ wide spring steel stock, close grain C1095 high carbon steelMaterial is ground and polished to precision tolerancesUsed in manufacturing, maintenance and tool & die operations wherever setting close spacing or checking extremely tight tolerances is requiredThicknesses are clearly etched every 6″ in decimal and metricFeeler Gage stock is packaged in 5″ or 12″ flat lengths, 25 feet coils and in convenient assortments