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. Millimeter Reading Thickness Gages with Straight Leaves. Range: 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.15, 0.20, 0.30, 0.40, 0.50mm