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: 0.05, 0.10, 0.15, 0.20, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.0mm