Precision Brand 19775 Steel Thickness Feeler Gage, 0.034" Thickness, 1/2" Width, 12" Length (Pack of 12) 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 0.034"